It's odd how I don't get this topic for a month, I spend hours reading through the text book and I still don't get it. I then come across this video and get it instantly! Thank-you!!
Thanks so much! Actually understood this just need to keep repeating it to get it in my head! Its funny how my Chem Teachers needed 3-4 lessons to explain this and even then they rushed through it, I didn't understand barely any of it...But you explain it perfectly in 40 (which is 5 mins earlier than a single lesson in my school) making it easier to understand. Ty once again!
Hey. Very nice video...thank you! But I do have one question. In the beginning in the table the KBr solution turned orange when Cl2 was added because of bromine water being formed which is orange right? And in KI the solution turned brown when Cl or Br was added because iodine solution is brown right? That makes it easy to learn because I already know the colours of the solutions. However, I’m a bit confused at around 29:26 when you said the bromine would produce brown fumes...shouldn’t it be orange? And that the iodine would produce a black solid...wouldn’t it be brown? Please clear up my confusion. This video was great though! It really helped. I’m just confused in one thing
Your videos are helping me so much! Very compact and straight forward with key information required for exam, eliminating things we do not need to know which are included in the textbook! Thanks again!
Just a quick question, you mentioned that you couldn't find an equation for the formation of sulphur in the reaction of Iodide with sulphuric acid but when we learnt it we were also taught H2SO4 + 6HI --> S + 4H20 + 3I2 so I was wondering if this was correct? Thanks
E Rintoul I used to run windows from a separate partition so i could run it on its own in order to play games, but windows kept messing up after some time for different compatibility reason. So I just installed parallels and now I run windows and mac at the same time on the same partition. But because doing this takes up a lot of ram you can't play major on windows while windows and mac are running at the same time. For me when im using Microsoft office programs, they run smoothy together on 16gb of ram. :)
Thank you so much! A big fan of yours. Just a quick question, about the Iodide reduction with conc H2SO4 My teacher taught us .... NaI + H2SO4 --> NaHSO4+ HI HI + H2SO4 --> I2 + H2S + 4H2O Is that correct? Or Is it better off me learning your version? which you said is specified.
+may thu aung win sorry if i'm incorrect but is the 2nd equation meant to have these products instead: sulphur dioxide (SO2) instead of H2S (also should have I2 and H20? (unless you intended to write this displacement as the last stage of displacement (3rd stage) in which you would be correct).
One of my Chem teachers is useless.. The other is amazing. So, I can only do half of Unit 2 (due to the good teacher lol) and the other half I can't do because she doesn't properly teach us. BUT! Thanks to you, I'm starting to understand the other half of Unit 2 that I did not understand so thank you. Unit 2 exam on Tuesday. Studying 24/7 now haha.
QUESTION ………….. Can you use TRANSITION metal halide salts like iron bromide or tin bromide to make the corresponding acid HBr by dripping sulfuric acid on the salt...……….OR DOES IT HAVE TO BE A SODIUM BROMIDE????????????????????????
quick question based on 29:20 my aqa book says 2H+ +2BR + HSO4> SO2 + 2H20 + BR where as on your video there is no bromines in the second reaction. can you explain why? please i got an exam coming up tomorrow and i really dont understand, i was also wondering since i understood it your way, would i lose marks for not putting the bromine in.
Don't worry about it i looked at the mark scheme for a question based on this, and your explanation is right. its probably because my exercise book has complex compounds.
Plz Can I ask a small question... When u say sulphur dioxide has been reduced is it because the sulphur has been reduced from +6 to +4? Why did you not consider it as separate molecule. I mean just because sulphur has been reduced do we say whole sulphur dioxide has been reduced? Thank you
Thank you for your amazing videos after i have lost motivation and nearly quite on going to my exam i found your videos and it made thing easier and way simple thank you lots
+Kyosuke Sagara Feel like I should try and put some Spinal Tap quote here but I can't quite get it to fit. Anyway, you got the A so the credit is all for you!
Thank you so much, sir. You don't realize how much of a favour you're doing by spreading education in the world. You're literally changing the world. Thank you so much! I'll be done with my Alevels in OCT/NOV, but never making such informative Alevel vids, I assure you, it'll be a great help for the next generation of students as well!!!
F.J Vinzenz I'm a little confused... do you mean bromide? If so, the bromide ion is acting as a reducing agent. One way to tell is that the bromide ion is itself being oxidised from -1 as bromide to 0 as bromine. Does that make any sense?
great example of why this guy is a better teacher than my teachers: if my teachers had just called it formation of bleach i would've remembered it from the start
This video is really helpful, especially after forgetting the complexity of the equations over Easter break. Just wanted to ask what app/ website do you use to make your videos. It would be really helpful to know, so I can make my own summary videos to come back to when I’m studying A2.
after mygcsescience was no more for a level (clue's in the name) i had no nope. how could i binge videos before every exam to ensure i got a good grade now?? and then someone in my class recommended your channel and with that i have found my saviour. really nicely done videos with nice looking layouts and good explanations that are detailed but summarised!
Hi, I'm a bit confused because in my textbook I've read that when KI reacts with Br or Cl it produces a red solution if you are mean with the amount chlorine or bromine used. And if you use the chlorine or bromine in excess it goes grey and I really don't understand why. So if anyone could help me out that would be very much appreciated!!!1
About the strong acid...HCl is a STRONG acid, but that doesn't mean the same thing as a concentrated acid. It is strong, but very very dilute..so H+ ion conc is very low...do more of this in year 13 so don't worry too much if you are in year 12.
Why is it that with the naoh in the formation of bleach you can ignore the oxidation states of any compound without a halide in it but in reactions with h2so4 you consider the oxidation state of sulfur in h2so4 and so2 aswell?
omg this was soooooooo helpful, I couldn't understand it in class, and the book further baffled me. Thank you! I have made some very useful notes based from this video. It's 00:55 and I should probably sleep as I'm tired, but I need to watch more of your videos! I have a mock later this week x
E Rintoul there's also another equation i have been taught, it is when the chloric acid further ionises. H2O + HCLO ----> CLO + H3O Do we need to know this ^
Thank you so much I am in A2 and I have mocks in a few weeks, I have never really understand this topic in class until now. I always find your videos helpful I just use the text book for references. Thanks again
Nice video but again, according to the AS portion there is another disproportionation reaction. The one you did was in cold alkali (15 degrees celsius). The one with hot alkali (NaOH at 70 degrees celsius): 3Cl2 + 6H20 ---> 5NaCl + NaClO3 + 3H20. Please add that. Other than this, solved all my doubts, thank you so much.
Yash Verma Again, as per the other comments that you left, thank you for taking the time to leave them. However, as per the other video, you really need to check your facts before trying to correct me. Here's an excerpt from the specification, relating to the reaction that you mention: "know the reaction of chlorine with cold, dilute, aqueous NaOH and the uses of the solutions formed" In my book, cold is not 70 degrees.
was doing a past paper when i realised my teacher completely skimmed over this topic.... then saw that i lost 15 marks for it! but your videos always save the day
my a level chem exam is tomoz, i owe you many thanks, i think u have just saved me xD. Great guide, sums it up very well and makes it much less confusing than in class
Thanks a lot for these videos, they really help. About 30 mins in, in the third extra step for iodine, wher do you get the HI from if it had been previously used in step 2? Once again thanks for all the help.
Will we ever have to talk about how fluorine deviates from the trends in atomisation energy and electron affinity and thus how instead the trend in hydration enthalpy better explains the trend in oxidising power? Or should we stick with the 'faulty explanation' (so-called by Jim Clark on Chemguide)? Thanks a lot! :) Also, shouldn't NaClO be called sodium chlorate (I), to differentiate it from NaClO3?
Eddard Stark Fluorine isn't required for this topic, only Cl, Br and I! I guess they could start looking at astatine and fluorine, but it would be incredibly harsh and I'm really not convinced that they would! Yeah, it should be that, but NaClO3 isn't in the spec!
Aamena Akubat It's a direct result of their charge. Each ion has a charge of -1, not -2. The oxide ion, with a double negative charge, would have an oxidation number of -2. When working out the oxidation numbers, the big numbers used to balance have no impact. That helped?
Chemguide states that the colour of iodine in solution (if there's iodide for it to react with) is red, and if there's no iodide it'll form a "dark grey precipitate". Although, I doubt we would ever be examined on the colour produced, and if we were it'd be bromine or chlorine, probably
Thank you so much for the video! So useful! Just liked to correct that halides are oxidising agents becuase they are themselves reduced. But apart from that, great work! Keep it up!
If you still need help with your A Levels, check out Alt Academy, we have a LOAD of resources that you can use for your exam prep. Video Lessons, Flash Cards, Handwritten solved past papers with explanations, Live Yearly Past Paper solutions, revision guides, 24/7 academic support and SO MANY more things. You'll ace your exams!
The reason it is not used in this particular test is because we are specifically looking for the colour of the precipitates produced as a result of the reaction of the silver and halide ion. If we add sulphuric acid, that will react with the halide ion (think back to the point in the video when I talk about the reaction of the halides with sulphuric acid!), interfering with our results!
why do we add acid to everything? Like with the displacement reaction a halogen is in potassium or with alcohols and potassium dichromate it must be in an acidic solution.
mate, its because it removes impurities such as : chlorates, sulphites and carbonates. btw I don't know why but I checked out your revision playlist and its not bad ngl but mate whats up wid em uploads? Its 2017 and dem 480p videos aren't good enough. Even this video is in higher quality.
bro grime music is the one :) n acid acts a base in some reactions and has a different purpose in each reaction but it varies n most of my videos were from fullmatchandshows.com so the quality was worse because i pretty much copied and pasted it bruv :))
Why you gonna be admitting to the crime mate? I swear down youtube is gonna take it down if you aint careful. BTW my g knows about dat grime and good luck on your exams g
Fantastic videos! Thank you so much!! 😁 Looking out for A-Level Physics and Maths also, whilst we have moved more heavily to online learning from college.
Yeah, the chlorine is dissolved in water to make an aqueous solution. At this point you might be thinking that the chlorine reacts with the water, but my understanding is that it is a slow process and so over time the chlorine amount dwindles.
![BRASIL vs. PERÚ [4-0] | RESUMEN | ELIMINATORIAS SUDAMERICANAS | FECHA 10](http://i.ytimg.com/vi/tbyOJKXfQnI/mqdefault.jpg)
bro made this when I was in year 5 and 8 years later i'm here in year 13 using this MAD
LMAO, here I am year 12
@@DegenPlayz good luck lmao, I’d hate to be you
I was 7 when he made these and here i am doing my A levels 😂. Good luck to anyone doing them! 😊
You're an absolute saviour man.. I find watching these so much more beneficial than reading the books! Thank you
Marcus Preedy Excellent!
I might have to apply the 'formation of bleach' to a use other than cleaning, if my exam this afternoon is as bad as the specimen papers.
Your videos are so concise 👍 I can't imagine how your lesson must be like. Do you manage to do the entire AS course in one term haha
Our teacher did that and now I dont understand anything but this guy is amazing regradless
"I chose potassium because... I like the look of the K"
Pretty valid tbf
@@nosir1479 4 likes on ur comment after 7 years! Shows how legendary his channel is
💥🔫 he slaps da K
@@farhanmirza8327 7 likes now
@@plamenvasilev798016 now
It's odd how I don't get this topic for a month, I spend hours reading through the text book and I still don't get it. I then come across this video and get it instantly! Thank-you!!
lovely mate :/
For those of u who wants to know the sulphur one then this is the equation
6HI + H2SO4 ----> 3I + 4H2O + S. Which is yellow solid
3I2 not 3I
What are the 2 half equations for that?
That’s not in the spec
@@hillaryantwi9279 thats cos 6 years agi was old spec. they updated it after 2016
@@user-rg2lp1hj4k so this equation aint on the spec?
not watched any of the videos yet , but just wanted to say that we appreciate you taking the time out to produce these videos , very grateful
Maybe you should watch them before thanking me... haha. Thank you for the kind words, though!
E Rintoul currently watching them mate, good stuff learnt more in these 40 minutes than I have in the entire year in college.
abz4life100 Good work! And thank you for the comments, they are appreciated.
Thanks so much! Actually understood this just need to keep repeating it to get it in my head! Its funny how my Chem Teachers needed 3-4 lessons to explain this and even then they rushed through it, I didn't understand barely any of it...But you explain it perfectly in 40 (which is 5 mins earlier than a single lesson in my school) making it easier to understand. Ty once again!
***** No problem!
M3HAN_ Anytime!
Thank you very much E Rintoul! Can I just ask when the bromine reacts with the sulfuric acid does it produce Na2SO4 instead of NaHSO4?
It can produce both. On the mark scheme they accept half equations with NaHS04 and Na2S04
This bit is GCSE on STEROIDS. This guy is my hero
PLUS H2S
@@luttycorp 😂😂
Honestly, i have no idea what i would do without your videos. You are Literally saving my a levels.
Hey. Very nice video...thank you! But I do have one question. In the beginning in the table the KBr solution turned orange when Cl2 was added because of bromine water being formed which is orange right? And in KI the solution turned brown when Cl or Br was added because iodine solution is brown right? That makes it easy to learn because I already know the colours of the solutions. However, I’m a bit confused at around 29:26 when you said the bromine would produce brown fumes...shouldn’t it be orange? And that the iodine would produce a black solid...wouldn’t it be brown? Please clear up my confusion. This video was great though! It really helped. I’m just confused in one thing
Your videos are helping me so much! Very compact and straight forward with key information required for exam, eliminating things we do not need to know which are included in the textbook!
Thanks again!
This video was sooooo helpful, I can't thank you enough for this, you are truly the best chemistry teacher ever
Just a quick question, you mentioned that you couldn't find an equation for the formation of sulphur in the reaction of Iodide with sulphuric acid but when we learnt it we were also taught H2SO4 + 6HI --> S + 4H20 + 3I2 so I was wondering if this was correct? Thanks
Hannah Mohsen Yeah looks good to me!
This helped me so much! My chemistry teacher is annoyed because I mention how useful you are in all my lessons. Thank you so much!
Very useful to watch the night before the exam to pick up some of the small details, thank you!
Ismail Umarji Absolutely! Make sure you are well-rested for tomorrow.
Bit of a stupid question but is this also for A levels or just GCSE?
+Mr Savage It's ideally for A-Level.
Thank you so much... I wish my teacher could transfer his knowledge across like you do. By the way, may I ask what program you use? Do you use a mac?
Arman Ashourlou No, I'm a Windows man! It's a program called smoothdraw - try it!
E Rintoul Oh. i've got windows too, on my mac. Thanks for letting me know ^.^
Arman Ashourlou Dual-boot, yeah?
E Rintoul I used to run windows from a separate partition so i could run it on its own in order to play games, but windows kept messing up after some time for different compatibility reason. So I just installed parallels and now I run windows and mac at the same time on the same partition. But because doing this takes up a lot of ram you can't play major on windows while windows and mac are running at the same time. For me when im using Microsoft office programs, they run smoothy together on 16gb of ram. :)
Suddenly RUclips is full of scientists rather than haters, thanks
+Samantha Job
No problem!
"gcse on steroids", helpful vid thanks dude :)
Thank you so much! A big fan of yours.
Just a quick question, about the Iodide reduction with conc H2SO4
My teacher taught us ....
NaI + H2SO4 --> NaHSO4+ HI
HI + H2SO4 --> I2 + H2S + 4H2O
Is that correct? Or Is it better off me learning your version? which you said is specified.
+may thu aung win There are various differences with the iodine one. if it was me, I'd use both examples!
+may thu aung win sorry if i'm incorrect but is the 2nd equation meant to have these products instead: sulphur dioxide (SO2) instead of H2S (also should have I2 and H20? (unless you intended to write this displacement as the last stage of displacement (3rd stage) in which you would be correct).
hi at 38:38 you say 'dissolves in conc NH3' for the 'AgBr'. what dose conc mean? thank for the videos
"Conc." means "concentrated." Sorry if I didn't make that clear!
K thanks
One of my Chem teachers is useless.. The other is amazing. So, I can only do half of Unit 2 (due to the good teacher lol) and the other half I can't do because she doesn't properly teach us. BUT! Thanks to you, I'm starting to understand the other half of Unit 2 that I did not understand so thank you. Unit 2 exam on Tuesday. Studying 24/7 now haha.
QUESTION ………….. Can you use TRANSITION metal halide salts like iron bromide or tin bromide to make the corresponding acid HBr by dripping sulfuric acid on the salt...……….OR DOES IT HAVE TO BE A SODIUM BROMIDE????????????????????????
The'GCSE on steroids' tho.... Great video!!!! Helped me a lot since I have no idea what my lecturer is talking about.
quick question based on 29:20
my aqa book says 2H+ +2BR + HSO4> SO2 + 2H20 + BR
where as on your video there is no bromines in the second reaction.
can you explain why? please i got an exam coming up tomorrow and i really dont understand, i was also wondering since i understood it your way, would i lose marks for not putting the bromine in.
Sumiya Elmi I don't know whether I'm confusing the question, but at 29:20, there is bromine...?
Don't worry about it i looked at the mark scheme for a question based on this, and your explanation is right. its probably because my exercise book has complex compounds.
Plz Can I ask a small question... When u say sulphur dioxide has been reduced is it because the sulphur has been reduced from +6 to +4? Why did you not consider it as separate molecule. I mean just because sulphur has been reduced do we say whole sulphur dioxide has been reduced? Thank you
Thank you for helping me through a levels whether i fail or not
Exams in two weeks, none of this topic stays in my head
Thank you for your amazing videos after i have lost motivation and nearly quite on going to my exam i found your videos and it made thing easier and way simple thank you lots
Thanks so much for these videos, they really helped me get an A at AS chemistry.
11/10
+Kyosuke Sagara Feel like I should try and put some Spinal Tap quote here but I can't quite get it to fit. Anyway, you got the A so the credit is all for you!
Thank you so much, sir. You don't realize how much of a favour you're doing by spreading education in the world. You're literally changing the world. Thank you so much! I'll be done with my Alevels in OCT/NOV, but never making such informative Alevel vids, I assure you, it'll be a great help for the next generation of students as well!!!
The way you said cleaning at 14:38 just made my day, (thinking about all the poor unfortunate A level students who have never cleaned anything :') )
Peony Effin is that u in profile pic
@@mohameddalghous that’s Hailey bieber my g
You're an absolute legend! Everything explained, all very concise! 10/10
Do we need to know the equations IF you do NOT add nitric acid to the halide solution? Eg: 2Ag+ + CO3(2-) = Ag2CO3?
Ag+ + OH- = AgOH?
at time 29:44 the reaction of Bromine with H2SO4; What was the reducing agent? The bromine? As it is reducing the sulphur whilst oxidising itself?
F.J Vinzenz I'm a little confused... do you mean bromide? If so, the bromide ion is acting as a reducing agent. One way to tell is that the bromide ion is itself being oxidised from -1 as bromide to 0 as bromine. Does that make any sense?
That's perfect, many thanks
This video is so great! I am writing my May/June series this year! This summaries quite well and I can take lecture through this!
Thank you!!
great example of why this guy is a better teacher than my teachers: if my teachers had just called it formation of bleach i would've remembered it from the start
This video is really helpful, especially after forgetting the complexity of the equations over Easter break. Just wanted to ask what app/ website do you use to make your videos. It would be really helpful to know, so I can make my own summary videos to come back to when I’m studying A2.
yowat grade did u get
after mygcsescience was no more for a level (clue's in the name) i had no nope. how could i binge videos before every exam to ensure i got a good grade now?? and then someone in my class recommended your channel and with that i have found my saviour. really nicely done videos with nice looking layouts and good explanations that are detailed but summarised!
you are a lifesaver, many thanks.
Hi, I'm a bit confused because in my textbook I've read that when KI reacts with Br or Cl it produces a red solution if you are mean with the amount chlorine or bromine used. And if you use the chlorine or bromine in excess it goes grey and I really don't understand why. So if anyone could help me out that would be very much appreciated!!!1
OMFG AFTER 2 DAYS STRAIGHT OF WATCHING VIDS ABT THE HALOGENS, I FINALLY GOT IT BC OF THIS VIDEO 😭😭😭 I COULD CRY TEARS OF JOY RN GNG TSYM SIR 😭🙏🙏
When using chlorine to treat water, it produces HCl, why does that not present a danger, it's a pretty strong acid isn't it? Am I missing something?
About the strong acid...HCl is a STRONG acid, but that doesn't mean the same thing as a concentrated acid. It is strong, but very very dilute..so H+ ion conc is very low...do more of this in year 13 so don't worry too much if you are in year 12.
Why is it that with the naoh in the formation of bleach you can ignore the oxidation states of any compound without a halide in it but in reactions with h2so4 you consider the oxidation state of sulfur in h2so4 and so2 aswell?
Thanks for an excellent video, your students are really lucky.
Your videos are absolutely amazing and I don't know what I would do without them. You've helped a LOT of students, thank you so much!
Thought you were going to write 'Not lying' at 25:46 instead of 'Not Redox' XD
Mo Tayee Haha!
Yeah I thought that too
omg this was soooooooo helpful, I couldn't understand it in class, and the book further baffled me. Thank you! I have made some very useful notes based from this video. It's 00:55 and I should probably sleep as I'm tired, but I need to watch more of your videos! I have a mock later this week x
Boro Jen xX Keep up the hard work! But DON'T overdo it. I promise it will not help - find a healthy balance between work and play.
E Rintoul there's also another equation i have been taught, it is when the chloric acid further ionises.
H2O + HCLO ----> CLO + H3O
Do we need to know this ^
Boro Jen xX I would say no. It is in one of the textbooks I have, but I've never seen it required in an exam...
Doing mocks tomorrow and because of covid I may not have exams so trying my best, this helped so much thankyou!!
Thank you so much I am in A2 and I have mocks in a few weeks, I have never really understand this topic in class until now. I always find your videos helpful I just use the text book for references. Thanks again
Wouldn’t Br2 produce orange fumes in the redox reaction?
Nice video but again, according to the AS portion there is another disproportionation reaction. The one you did was in cold alkali (15 degrees celsius). The one with hot alkali (NaOH at 70 degrees celsius):
3Cl2 + 6H20 ---> 5NaCl + NaClO3 + 3H20.
Please add that. Other than this, solved all my doubts, thank you so much.
Yash Verma Again, as per the other comments that you left, thank you for taking the time to leave them. However, as per the other video, you really need to check your facts before trying to correct me.
Here's an excerpt from the specification, relating to the reaction that you mention:
"know the reaction of chlorine with cold, dilute, aqueous NaOH and the uses of the solutions formed"
In my book, cold is not 70 degrees.
I'm sure you're supposed to, it's in the books.
I've learnt it anyways, don't know what aqa are feeling nowadays
was doing a past paper when i realised my teacher completely skimmed over this topic.... then saw that i lost 15 marks for it! but your videos always save the day
my a level chem exam is tomoz, i owe you many thanks, i think u have just saved me xD. Great guide, sums it up very well and makes it much less confusing than in class
Thanks a lot for these videos, they really help.
About 30 mins in, in the third extra step for iodine, wher do you get the HI from if it had been previously used in step 2?
Once again thanks for all the help.
Danyaal Qureshi It would be iodide ions that still remain from the first step.
you are acc the reason i'm going to pass chem! Thank you!!!!!!!!!!!!!!!!!!!!!!
Your videos are simple and to the point!! Thank you so much👍🏻 please keep uploading more!
Will we ever have to talk about how fluorine deviates from the trends in atomisation energy and electron affinity and thus how instead the trend in hydration enthalpy better explains the trend in oxidising power? Or should we stick with the 'faulty explanation' (so-called by Jim Clark on Chemguide)? Thanks a lot! :)
Also, shouldn't NaClO be called sodium chlorate (I), to differentiate it from NaClO3?
Eddard Stark Fluorine isn't required for this topic, only Cl, Br and I! I guess they could start looking at astatine and fluorine, but it would be incredibly harsh and I'm really not convinced that they would! Yeah, it should be that, but NaClO3 isn't in the spec!
E Rintoul Okay, cool. Thanks a bunch! :)
In the third reaction for iodide shouldn’t the HI be reacting with the sulfuric acid rather than the SO2 to produce the H2S
wish all teachers were as good at explaining as you
You're videos are unbelievably useful👍🏽👍🏽
I am lucky to find this.....
DiLLZGFX You certainly are...
30:36 shouldnt HI be reacting with H2SO4 here?
In the ionic equation of Cl2 + 2Br- ---> Br2 + 2Cl- why is the oxidation state of the ions -1 and not -2?
Aamena Akubat It's a direct result of their charge. Each ion has a charge of -1, not -2. The oxide ion, with a double negative charge, would have an oxidation number of -2.
When working out the oxidation numbers, the big numbers used to balance have no impact.
That helped?
Ahhh i get it... Thanks for that!
Thank you so much, i find myself going back to your channel for help
What university did you go to? Btw thank you so much your videos are really helpful
+EXO K&M I went to the University of Sheffield. Why...?
love all your videos sir! My teacher specifically recommended you for revision, i can really see why :-)
can you make a video based on period 3 elements and their reactions with water and oxygen?
Do we need to include state symbols for any of these reactions?
Very helpful video by the way :)
i think so dude
This is a banger of a video geez
JustAnotherTeen is it tho?
Thank you soooo much for this video! I found it again very helpful :)
***** Good :)
you're really good at teaching yknow
is it not the hypochlorite ion used in bleach rather than the chlorate ion as the ClO- is hypochlorite and ClO3- is chlorate
Late night cramming before Paper 1 tomorrow, I know you're all here for that reason :)
Chemguide states that the colour of iodine in solution (if there's iodide for it to react with) is red, and if there's no iodide it'll form a "dark grey precipitate". Although, I doubt we would ever be examined on the colour produced, and if we were it'd be bromine or chlorine, probably
+Jack Devin It's a red-brown colour, yeah. I'm not sure what your point is though...
This video was very useful and I definitely understand this topic more . Thank you :)
LoveLife997 Excellent :)
I thought that br is red-brown not orange ???
Best chem tutorials on the net
Sir what happens to the NaHso4
OMG You're a pure life-saver! This has helped me so much! Thank you!
Thank you so much for the video! So useful! Just liked to correct that halides are oxidising agents becuase they are themselves reduced. But apart from that, great work! Keep it up!
If you still need help with your A Levels, check out Alt Academy, we have a LOAD of resources that you can use for your exam prep. Video Lessons, Flash Cards, Handwritten solved past papers with explanations, Live Yearly Past Paper solutions, revision guides, 24/7 academic support and SO MANY more things. You'll ace your exams!
thank you so much for this i found this topic so hard since o'levels but this video explained it really well
39:00 why isn't sulphuric acid used instead of nitric acid?
The reason it is not used in this particular test is because we are specifically looking for the colour of the precipitates produced as a result of the reaction of the silver and halide ion.
If we add sulphuric acid, that will react with the halide ion (think back to the point in the video when I talk about the reaction of the halides with sulphuric acid!), interfering with our results!
I love how at 32:32 you were talking about the toxicity of the gas and took a deep inhale as you mentioned it lol
Omg thank you so much for this video. I really understand Group 7 halogens now :)
LoveLife997 Excellent :)
why do we add acid to everything? Like with the displacement reaction a halogen is in potassium or with alcohols and potassium dichromate it must be in an acidic solution.
we just assume its on its own even though that isnt correct, its just for the sake of simplicity :/
mate, its because it removes impurities such as : chlorates, sulphites and carbonates.
btw I don't know why but I checked out your revision playlist and its not bad ngl but mate whats up wid em uploads? Its 2017 and dem 480p videos aren't good enough. Even this video is in higher quality.
bro grime music is the one :)
n acid acts a base in some reactions and has a different purpose in each reaction but it varies n most of my videos were from fullmatchandshows.com so the quality was worse because i pretty much copied and pasted it bruv :))
Why you gonna be admitting to the crime mate? I swear down youtube is gonna take it down if you aint careful.
BTW my g knows about dat grime and good luck on your exams g
a002 mate it wasn't monetised and only had a couple hundred views on most of them, it's not like I'm losing a job
I'm speechless for how to thank u!! This channel is wow!! though Can u make videos for edexcel chemistry the new specification?
Just one thing NaClO would be Sodium Hypochlorite as opposed to Sodium Chlorate which is NaClO3
Fantastic videos! Thank you so much!! 😁 Looking out for A-Level Physics and Maths also, whilst we have moved more heavily to online learning from college.
Thank you so much, you're a lifesaver
naclo is sodium hypoclorite naclo2 sodium chlorite naclo3 sodium chlorate naclo4 sodium perchlorate ?? Why is Naclo is this video sodium chlorate ?
timithy boring Strictly speaking, yes. I think you can also class NaClO as chlorate(I), but I use that name to make things a little more simple!
Thank you my brudda
Hiqbal4 No problem, chap.
when you say Chlorine water, does that mean its aqueous?
Yeah, the chlorine is dissolved in water to make an aqueous solution.
At this point you might be thinking that the chlorine reacts with the water, but my understanding is that it is a slow process and so over time the chlorine amount dwindles.
could someone tell me what aqa means? I'm from the edexel curriculum
AQA is just a different exam board so some of the content may be slightly different, although it will be largely the same
Thank u soooo much! You really make things look easier😂😂.cheers
are you a buddhist by any chance?
+zkosser what drug do u take?
+zkosser Not that I'm aware of...
+Andy Cole mostly cocaine and LSD from time to time 😉
Thanks so much!!! I am lucky to find this.....Thank you soooo much for this video!
hm khan No problem at all!