@@hprivate9114 they over complicate it so much. For my mocks I used him and the revision guide and that was it and I got a 9 in biology and 8 in chem and physics. But I feel like teachers add so much extra stuff that overcomlicate it
1. Is the knowledge of the products of the metal carbonate reactions needed 2. Also, does one need to know the equations for such reaction many thanks, another really helpful video
I’m here the night before chemistry paper 2, thank you so much for everything you have done for me throughout my GCSEs and i look forward to watching more of your videos for a-level chemistry and biology. 👍
Please answer if you get time: Are esters part of a homologous series? (I just want you to know, you have helped me sooo much with my science revision, thanks!)
Thank youuuu!!! I can't remember half the stuff from chemistry class cos my teacher's a bitch XD You are my saviour, I think I might actually pass the sciences.
Hey I am abit confused on the matter of the formulas of the carboxylic acid, For example for propanoic acid you have displayed it as CH3CH2COOH. I was wondering if in the exam I could put C2H5COOH instead? as it is easier to remember that than the lengthier version. Cheers!
i swear there was a way of figuring out the structural formula from the name and vice versa. Memorising sucks balls and is the bane of all learning and education and understanding
@@thinginground5179 To find the structural formula of carboxylic acids you need to know the number of carbon atoms (eg propanoic acid = 3), they will always start with CH3 (at beginning of chain) and have CH2 (in middle of chain) and end in COOH (functional group) according to how many carbon atoms there are. Methanoic acid is just HCOOH though because there's one C atom (as part of the COOH at the end) so only 1 H bonds to it since Carbon atoms have 4 bonds (2 for the C=O, 1 for the C-OH, so 1 remaining for the H). Adding another C for ethanoic and you get CH3COOH (the new C has to have 4 bonds remember). Any other Cs get added to the middle so can only be CH2, eg propanoic which is CH3CH2COOH. At this point you just add another CH2 to the middle for each new carbon atom, butanoic acid = CH3CH2CH2COOH etc
Hi. I show the structural formula but not the molecular formula since that does not show you how the ester molecule looks. According to the AQA GCSE spec ethyl ethanoate is the only ester that you are meant to know the name of.
Im so confused, so when a carboxylic acid reacts with water e.g ethanoic acid, it produces ethanoate ion?? But why isn’t water one of the products in the equation?
if it asks in the exam to write structural formula of propanoic acid( or any hydrocarbon) do you write CH3CH2COOH or C2H5COOH or are both ways acceptable
Hi, not sure if it's true or not but from what I've seen I think it's best to go with the structural formula since that's what appears in most questions I see. However, feel free to clarify with a teacher bc I'm not much of an expert
I don't understand why carboxylic acids which partially ionise in aqueous solutions results in them having a higher pH than a strong acid. Can anybody help? 1:52 to 2:00
The higher the pH, the lower the concentration of H+. Because carboxylic acids only partially ionise in aqueous solution, the concentration of H+ is relatively low, so the pH is higher than for strong acids.
@@lizziellama If it fully ionised all the molecules of carboxylic acid would ionise into the carboxylate ion (eg ethanoate, methanoate etc) and H+, instead of only some. So there would be a higher concentration of H+ ions in the solution making it a strong acid with a low pH (since low pH = stronger acid). But carboxylic acids only partially ionise so are weak acids.
You could be asked to so it's worth trying to learn them if you can. But there are lots of other things to learn, so some student prioritise the material that they find easier and then come back to this later.
The reaction of Ethan’s I acid with ethanol to produce ethyl ethanoate isn’t Balanced the ethyl ethanoate is missing 2 hydrogens is this because hydrogen gay is produced as a by product ??
@@Freesciencelessons sorry about he vagueness I meant the display formula at 3:02 where you said we could be asked to name it. How do you identify it? Do we use the display formula or figure it out using the reactants (if provided)?
The AQA GCSE spec says that students do not need to know the names of any ester apart from ethyl ethanoate. To be honest, at GCSE level, I'd be surprised if any specification asked you to name an unfamiliar ester (I don't know if the IGCSE would).
sir for propanoic you have put CH3CH2COOH as the displayed fromula whereas in the CGP books its simplified to C2H5COOH does it matter which way you write it?
yes sir Sean I will always remember that you have plenty of questions in your revision workbook, love the videos
The fact teachers take multiple lessons to explain things he explains in 4 mins. And I still understand these videos more than school
yes i just dont understand what my teachers be saying- i use his videos to understand it then use revision guide to make sure i know everthring
@@hprivate9114 they over complicate it so much. For my mocks I used him and the revision guide and that was it and I got a 9 in biology and 8 in chem and physics. But I feel like teachers add so much extra stuff that overcomlicate it
@@luna132 did you have a revision time table
@@luna132how was GCSE’s?.
Probably @@itstrulysam
Great video, I get A* in every chemistry test watching your videos. Thank you sir! 谢谢!
Thank you for your comment. It's great to hear that you're finding the videos helpful.
😊
Just wanted to say, Thank you for posting these videos and helping us out during our GCSEs ❤
Thanks for the comment, I appreciate it. I'm happy to help. Best wishes for your GCSEs.
@@Freesciencelessons thank you so much I have my chemistry GCSE today and I would be so unprepared without you!
The goat
this topic is so hard to remember but when u get the hang of it it’s so easy
Here coz we r top band students woo
Rebekah Link yasss mate
I’m here cos covid 19 won’t let us in school, woo
I’m here cuz I was put in set 1 chem despite only having one year of experience with it :) in year 10
@@RoyDaneri that's with everyone my g
ye lol, in a grammar school
Freesciencelessons id the best channel on youtube ong
2:00 very important
Chemistry GCSE tomorrow Sir - 🤞I might get a 9 thanks to you!!
Good luck. I hope that you do.
Did you pass?
@@Freesciencelessonsi did :) 🎉
1. Is the knowledge of the products of the metal carbonate reactions needed
2. Also, does one need to know the equations for such reaction
many thanks, another really helpful video
What did you get in GCSE’s?❤
Absolutely class video sir. Prior to this I was incredibly confused on this topic. Thankfully now I understand. Thank you sir 👍
I’m here the night before chemistry paper 2, thank you so much for everything you have done for me throughout my GCSEs and i look forward to watching more of your videos for a-level chemistry and biology. 👍
Morning Right before the chemistry exam - Cheers for the immense help from all sciences. Hopefully I can secure all 9s for the sciences
Can u make a video on how to name the organic compounds please. It will really help me out . Thank u for this much effort and hard work!!
i cant do this anymore
You have been chosen in my graduation speech
this topic is very complicated, especially when it is related to polymers
Please answer if you get time: Are esters part of a homologous series?
(I just want you to know, you have helped me sooo much with my science revision, thanks!)
Yes that's correct. Esters are part of a homologous series.
Great video - thank you!
Question: Ethanoic acid + water = Ethyl ethanoate as the only product? if you look at the structures your missing 2 Hydrogen atoms in the products.
The reaction also produces water but you're not required to know that for the AQA specification.
would we ever have to draw ethyl ethanoate or any other ester?
Thank you sir Sean u keep me going ,,,,, your videos are clear and easy to understand ,,thnks much ,,,
Thank youuuu!!! I can't remember half the stuff from chemistry class cos my teacher's a bitch XD You are my saviour, I think I might actually pass the sciences.
This was 2 years ago, but how did it go?
This was very helpful. Thank you!
what type of question would there be about reversible reactions
Now to make carboxylic acid we react alcohal with oxidising agent.
I salute you,sir! Thank you!
Which substance will be suitable to be used as a catalyst for this reaction
Hey
I am abit confused on the matter of the formulas of the carboxylic acid, For example for propanoic acid you have displayed it as CH3CH2COOH. I was wondering if in the exam I could put C2H5COOH instead? as it is easier to remember that than the lengthier version. Cheers!
No, strictly speaking with a structural formula, you should show each carbon atom. So I would stick with CH3CH2COOH.
i swear there was a way of figuring out the structural formula from the name and vice versa. Memorising sucks balls and is the bane of all learning and education and understanding
@@thinginground5179 To find the structural formula of carboxylic acids you need to know the number of carbon atoms (eg propanoic acid = 3), they will always start with CH3 (at beginning of chain) and have CH2 (in middle of chain) and end in COOH (functional group) according to how many carbon atoms there are. Methanoic acid is just HCOOH though because there's one C atom (as part of the COOH at the end) so only 1 H bonds to it since Carbon atoms have 4 bonds (2 for the C=O, 1 for the C-OH, so 1 remaining for the H). Adding another C for ethanoic and you get CH3COOH (the new C has to have 4 bonds remember). Any other Cs get added to the middle so can only be CH2, eg propanoic which is CH3CH2COOH. At this point you just add another CH2 to the middle for each new carbon atom, butanoic acid = CH3CH2CH2COOH etc
Thank you sir
Freesciencelessons plzz dont forget to tell us about the formula of ethyle ethanoate
I mean that chemical formula is vry complex .
Hi. I show the structural formula but not the molecular formula since that does not show you how the ester molecule looks. According to the AQA GCSE spec ethyl ethanoate is the only ester that you are meant to know the name of.
@@Freesciencelessons Why does the COO functional group move to the middle of the formula, instead of the end like OH COOH and the others?
@@clublinkadminoffice2425 look at the equation carefully the reactant is break down in reaction forming coo
do we have to know the ionic equations for those reactions?
No but you need to know why strong acids are strong and weak acids are weak in terms of ionisation. Also remember that acids release H+
Wouldn't water also be a product as well as ethyl ethanoate at 3:05 ?
Yes but for some reason we don't include that, even in exams it's not needed for some reason
Is there a general formula for carboxylic acids. For examples alkenes have CnH2n and alkanes have CnH2n+1. It confuses me as it gets rather lengthy.
Yes, it's CnH2n+1COOH
Do we need to know this one ?
@@emmeswales1037 probably not. It wouldn’t change a grade
can we just memorize the word equation for carboxylic acids with metal carbonates, or do we have to memorize the symbol equation as well?
I'd recommend trying to memorise both.
@@Freesciencelessons okay thank you
How does the 3 oxygen's in ethanol and ethanoic acid react to form 2 oxygen's???
Alec baldwin it produces water as a byproduct so Ethanol + Ethanoic acid --> Ethyl Ethanoate + Water
Keep up useful videos 😊
Im so confused, so when a carboxylic acid reacts with water e.g ethanoic acid, it produces ethanoate ion?? But why isn’t water one of the products in the equation?
You are correct but the water is not required in the spec so I left it out for clarity.
oh this is very useful trust me he is good
if it asks in the exam to write structural formula of propanoic acid( or any hydrocarbon) do you write CH3CH2COOH or C2H5COOH or are both ways acceptable
Hi, not sure if it's true or not but from what I've seen I think it's best to go with the structural formula since that's what appears in most questions I see. However, feel free to clarify with a teacher bc I'm not much of an expert
Do we need to know the structural formula for these reactions ( 2:21 & 2:28 ) word for word and every number too??
Check your syllabus, but I doubt it
I don't understand why carboxylic acids which partially ionise in aqueous solutions results in them having a higher pH than a strong acid. Can anybody help? 1:52 to 2:00
The higher the pH, the lower the concentration of H+. Because carboxylic acids only partially ionise in aqueous solution, the concentration of H+ is relatively low, so the pH is higher than for strong acids.
@@Freesciencelessons Thank You for the quick reply.
@@Freesciencelessons what do you mean by partially ionising? what would it look like if it was fully ionised?
@@lizziellama If it fully ionised all the molecules of carboxylic acid would ionise into the carboxylate ion (eg ethanoate, methanoate etc) and H+, instead of only some. So there would be a higher concentration of H+ ions in the solution making it a strong acid with a low pH (since low pH = stronger acid). But carboxylic acids only partially ionise so are weak acids.
hi i wanna ask why do we use sulfuric acid as the catalyst
How was GCSE’s?:).
Do we need to know the symbol equations for the reactions plz or is the word equation fine
No I wouldn't say so but it's definitely worth learning the word equations.
You’re a lifesaver. Thank you!
Sir is it ok if we dont write formulas in order for example CH3CH2COOH as C3H6O2?
I'm afraid that for organic molecules you need to write the formula in full as it shows the functional group.
@@Freesciencelessons what about C2H5OOH, sir?
Even that is not really quite correct as it does not show which atoms are connected. CH3CH2OH is better.
@@Freesciencelessons so the structural formula? Is that the one we should use?
for the final reaction, is h20 also made?
Yeah but we dont need to know it for the exam
Certified Biscuit yeh
Legend
Can we put this OH in the upper position of the H as u have placed in below so does this matter.
Thanks alot
i dont get how methanoic acid has a h attached to cooh isnt it meant to have h3
Well in sheen
sir do we need to be able to write and draw the reaction with alcohols
You could be asked to so it's worth trying to learn them if you can. But there are lots of other things to learn, so some student prioritise the material that they find easier and then come back to this later.
Will we have to know how to draw the displayed formula of all of the molecules mentioned in this video?
Let’s hope I don’t fail 🤗
The reaction of Ethan’s I acid with ethanol to produce ethyl ethanoate isn’t Balanced the ethyl ethanoate is missing 2 hydrogens is this because hydrogen gay is produced as a by product ??
Water is the byproduct but that's not in the spec.
Hydrogen gay is a fascinating substance
How do we identify which ethanoate is made?
I'm not sure what you mean? Do you mean the ion from the carboxylic acid or do you mean sodium ethanoate, potassium ethanoate etc?
@@Freesciencelessons sorry about he vagueness I meant the display formula at 3:02 where you said we could be asked to name it. How do you identify it? Do we use the display formula or figure it out using the reactants (if provided)?
The AQA GCSE spec says that students do not need to know the names of any ester apart from ethyl ethanoate. To be honest, at GCSE level, I'd be surprised if any specification asked you to name an unfamiliar ester (I don't know if the IGCSE would).
@@Freesciencelessons okay thank you very much
Are his videos aqa or edexcel
They're based on the AQA spec but the crossover with edexcel is extensive.
im so lost
This is a hard topic so I'd recommend rewatching the video to get the ideas.
igcse may june 2021 gang
How did it go?
sir for propanoic you have put CH3CH2COOH as the displayed fromula whereas in the CGP books its simplified to C2H5COOH does it matter which way you write it?
either is alright but the second one is easier to remember
No
It doesn't matter
What is a displayed formula?
Heyyy!! I cant find the revision workbook at all , whn the link ks clicked it just shows all the videos plz help
The workbooks haven't come out yet and won't come out probably until after the 2018 exams
This is hard
You sure u watching the right video?
Who is here for THCa
Also, the reaction with carboxylic acids + alcohols also forms water
it says that
chem paper 2 is the worst. definitely the hardest science paper
gamer moment
im in love w u
69th comment
Why Carboxylic acids have higher pH than HCL
rizwan ijaz they’re weaker acids than hydrochloric acid which is strong
If u have a higher pH that means u are less acidic (remember a neutral pH is 7)