@littlegreengirl174 The 58.44g/mol is the molar mass of NaCl. So use the mass numbers for Na and Cl and use the units g/mol. Add them up and you will get 58.44 g/mol. Thanks for watching. Best of luck with your studies. Mr.P
@photoxloan Hi there. Just to correct your formula, it should be Na2CO3. So the molar mass of CO3 would be (12.01+ (3x16)) = 60.01 g/mol. The 48 g you have is only for the O's. Hope this helps you. Thanks again for watching and using my videos with your home studies. Mr.P
At 6:27, your result is 9.94x10^-4 mol, but really it's 9.945x10^-4 mol. In my country (Spain), we often round up our results (in this case, it'd be 9.95x10^-4). Any way, thanks for posting your video. It helped me a lot :D
@ZahidAnwar5555 I rounded the answer based on "significant digits" used on the question. You have to understand the concept of significant digits to understand why I rounded 0.15 to 0.2. However, if your teacher doesn't mind you not using significant digits rule, keep your answer as 0.15 Hope this helps you. Good luck with your studies. Mr.P
Thank u so much , i have spent 3 hrs looking for a video that will help me , your video is short and it is intresting to watch . i love it i was wondering if u do as level physics
@lover4music94 Divide 50g by the molar mass of KNO3 to find your moles. Convert mL to to L and divide your moles by your volume that you've just converted.
I actually understood what you were saying! too bad I just now discovered you videos and podcast, my final for CHM130 is a week from tomorrow.. One thing that I didn't understand is how to find the final volume at the end? My question states "What final volume would be needed in order to prepare a 0.25 M NaCl solution from 5.2 g of NaCl (s)?
i did the question u can check whether its correct from ur chem master the wy i did is first convert 2.5*10 to the power 2 into litres then convert 1.5 g to moles and nacl g also to moles then multiply both the answers u got then u will gt the mass and on the previous calculation u gt the volume nw calculate the concentration the answer i got is 1.848*10 to the power minus 3 pls chech whther this is correct so that i can learn wt is correct
A student is instructed to titrate a solution of sodium hydroxide with hydrochloric acid. The hydrochloric acid available in the laboratory has a concentration of 0.8mol dm-3 but this is too concentrated for the titration and must be diluted to 0.08 moldm-3. The student decides to make 250cm3 of this diluted solution in a volumetric flask... Calculste what volume of the 0.8mol dm-3 hydrochloric acid student would need to mix with water to make 250cm3 of a 0.08 moldm-3 solution. PLZ CAN U DO DIS
i can't seem to get this question : a technician dissolves 50g of potassium nitrate (KNO3) in a small amount of water and then adds more water to obtain 500 mL of solution. What is the molar concentration of this solution?
thanks ALOT Doctor.. for the video very helpfull! Do you have a video about balancing oxidation - Reduction equations? i'm having a hard time understanding it. Thanks again.
oh wait.. i'm stuck.. i'm doing home studying with your help.. uhhm.. if I have NaCO3 what is the molar mass of CO3? is it 1 Carbon and 3 oxygens? so it's 48g? I know it's a little bit off topic here but I miss a tiny thing on my calculation then it would be worse in the final answer. thanks papa
I have been stuck on this question: Calculate the concentration of chloride ions when 1.5g sodium chloride and 1.5g calcium chloride are dissolved together in water to give 2.5 x 10^2 ml of solution. Please help me!
@@katiemunro7017 The answer has one significant digit because there are 2 rules when it comes to this. So when you multiply or divide your answer should have the least amount of sig figs from the numbers given in the problem. Then when you add or subtract your answer should have the least amount of decimal places. I hope that helps! If you need a better explanation... just look up rules for significant figures and that should clarify this concept.
currently in quarantine so i’ve gotta teach myself chem 11! thank you!
same here. It sucks!
The video goes back to 10 years this guy probably died
Same
@@elriclover4280 LMAO THATS TUFF
It sucks. 😞
this is teaching me more then my chemistry classes which are an hour and 40mins long..
My chemistry classes are 2- 3 hours long...🙂
Wait why are you taking chem for?
for pharmacy
Mine are 80
1/3 day, 8 hours
This lessons was for a grade 11 chemistry class - Canadian Curriculum
No
It is for grade 10
@@layalalkraidy3632 this is grade 11 stuff
this is useful for class 11 india also
all of these videos are literally the only reason im not failing chemistry right now...
12 years ago today this vid was premiered..big ups to you all and rip to those who’ve left this earth💔
This just taught me more than my chemistry teacher has in a class period
Iam an indian and it helps me alot in understanding the concept easilyy....nice explanation....... keep it up
@littlegreengirl174 The 58.44g/mol is the molar mass of NaCl. So use the mass numbers for Na and Cl and use the units g/mol. Add them up and you will get 58.44 g/mol. Thanks for watching. Best of luck with your studies.
Mr.P
thank u, u understand man
Good stuff. Thank you for taking the time to post your classes.
I didn't understand my class and tomorrow is my test.
It really helped! thanks!
Thanks Papapodcasts you're a true G
Studying for a midterm in college! You're videos are awesome. Thank you :D
You are a great teacher. Thank you. This has really helped. I have a test tomorrow.
Thank you so much papapodcasts. You are the reason why I'm doing so well in Chem :)
Me too
you know it's like physics. using the pyramid really helps. u have to find something first to find the other..it really helped.
You are a lifesaver!!! Thank you so much for these videos! They are a great help to me and my class!
FBI was called in to help the uploader not you that's why they escaped lol
@photoxloan Hi there. Just to correct your formula, it should be Na2CO3. So the molar mass of CO3 would be (12.01+ (3x16)) = 60.01 g/mol. The 48 g you have is only for the O's.
Hope this helps you. Thanks again for watching and using my videos with your home studies.
Mr.P
This is a good teacher guys thank you very much you help me
At 6:27, your result is 9.94x10^-4 mol, but really it's 9.945x10^-4 mol. In my country (Spain), we often round up our results (in this case, it'd be 9.95x10^-4). Any way, thanks for posting your video. It helped me a lot :D
@ZahidAnwar5555 I rounded the answer based on "significant digits" used on the question. You have to understand the concept of significant digits to understand why I rounded 0.15 to 0.2.
However, if your teacher doesn't mind you not using significant digits rule, keep your answer as 0.15
Hope this helps you. Good luck with your studies.
Mr.P
You are a god among men
awesome Mr P
kindly make a lecture on unit conversions...regards
Thank u so much , i have spent 3 hrs looking for a video that will help me , your video is short and it is intresting to watch . i love it i was wondering if u do as level physics
Thanks Mr. P! I know how to do my homework now! =)
TYY!
@MTAL4ever You are very welcome. I wish you great luck on your test. Thanks for watching.
Mr.P
V.v.v.v.v. gooooooooooood
Excelllent
🥳🥳👏👏
Awesome! That's great news. Not an easy topic. Keep up the hard work.
Thanks!! Please post more chemistry videos!
sso helpful with the strong voice, seriously helped!
@lover4music94 Divide 50g by the molar mass of KNO3 to find your moles. Convert mL to to L and divide your moles by your volume that you've just converted.
At 3:00 , how do you get the "58.44" ? I'm confused.
I actually understood what you were saying! too bad I just now discovered you videos and podcast, my final for CHM130 is a week from tomorrow.. One thing that I didn't understand is how to find the final volume at the end? My question states "What final volume would be needed in order to prepare a 0.25 M NaCl solution from 5.2 g of NaCl (s)?
How did it turn to 2.0? I dont get it
Omg thnx so much you are a great teacher. trust me i understood. please reply.
@papapodcasts Could you please make a video explaining how to calculate the Liters of a solution made with the given molarity and mass of the solute?
hellpful question and solution
thats help me a lot
thanks you are a life saver!!!!
i did the question u can check whether its correct from ur chem master the wy i did is first convert 2.5*10 to the power 2 into litres then convert 1.5 g to moles and nacl g also to moles then multiply both the answers u got then u will gt the mass and on the previous calculation u gt the volume nw calculate the concentration the answer i got is 1.848*10 to the power minus 3 pls chech whther this is correct so that i can learn wt is correct
A student is instructed to titrate a solution of sodium hydroxide with hydrochloric acid. The hydrochloric acid available in the laboratory has a concentration of 0.8mol dm-3 but this is too concentrated for the titration and must be diluted to 0.08 moldm-3. The student decides to make 250cm3 of this diluted solution in a volumetric flask... Calculste what volume of the 0.8mol dm-3 hydrochloric acid student would need to mix with water to make 250cm3 of a 0.08 moldm-3 solution. PLZ CAN U DO DIS
how do you calculate the average concentration of a solution after obtaining several concentration of a solution with different trials?
When talking about the % solution, why can we say % solution = g/100mL? For example 1.7% solution = to 1.7g/100mL
Well maybe it depends on the given value.
i can't seem to get this question : a technician dissolves 50g of potassium nitrate (KNO3) in a small amount of water and then adds more water to obtain 500 mL of solution. What is the molar concentration of this solution?
Thanks
please don't yell at the beginning, headphone users rip
In your last example, why do you round to two significant figures?
thanks for videos , that's very help full !
one more question i have on 4: 29 minuets why =0.15 mol/L change to = 0.2 mol/L ?
Where comes from 1.54 isn't
C=0.01/0.1?
Thank you sooooo much ! you saved me !
thanks ALOT Doctor.. for the video very helpfull!
Do you have a video about balancing oxidation - Reduction equations?
i'm having a hard time understanding it.
Thanks again.
okay okay, like was this recorded during a class or what, I feel like I can hear the students but the presentation on the screen suggests not
As a matter of fact I did teach this class live. Many of these senior level chemistry lessons were done during a live class.
I did not understand at 4:09 when the ans was 0.15....so how u convert it into 0.2mol/l
Thank you this helped me a lot!
this helped me so much thank you!
Thank you for this video...
Thank you sooo much !!
Thanks alot. How Chemistry class coming along?
Sir
Kindly tell how many miligrams are present in 1 ml of linalool ( as linalool is in liquid form)
oh wait.. i'm stuck.. i'm doing home studying with your help.. uhhm.. if I have NaCO3 what is the molar mass of CO3? is it 1 Carbon and 3 oxygens? so it's 48g? I know it's a little bit off topic here but I miss a tiny thing on my calculation then it would be worse in the final answer. thanks papa
Thank you very much for you help and for this video. Thank you for your effort and god bless! :)
Do you have a video on molality?
Tomorrow is my final exam for chemistry
Thx 🙏
Where did you get 58.44?
Very helpful thanks
Man thanks a lot!
very good. thank you so much!
Some kid has 99% in Gr. 12 chem and 96% in Gr. 12 pre-cal math - Shaun McDonald
shouldn't have had my volume up so loud at the beginning...
I have been stuck on this question: Calculate the concentration of chloride ions when 1.5g sodium chloride and 1.5g calcium chloride are dissolved together in water to give 2.5 x 10^2 ml of solution. Please help me!
5 years has passed and I bet you are still trying to figure the question out
what is the level of this chemistry? i mean what class of high school?
@sohoyankee66 Thank you for that acknowledgement I really appreciate it. Good luck with your studies.
Mr.P
He sounds like the Scout XD
Awesome
NICE
Why are you yelling? Great vid tho I smashed like.
This video was 11 years ago💀🤭
confusing me
Same here
Would anyone be able to tell me how he got 0.2L/mol from 0.15L/mol?
He wants his final answer in 1 decimal place
And why is the decimal place set at one significant digit? That part really baffles me. How do you know what the significant digit will be?
@@katiemunro7017 The answer has one significant digit because there are 2 rules when it comes to this. So when you multiply or divide your answer should have the least amount of sig figs from the numbers given in the problem. Then when you add or subtract your answer should have the least amount of decimal places. I hope that helps! If you need a better explanation... just look up rules for significant figures and that should clarify this concept.
he lowkey sounds like idubbbz
im gayyyyyyy
conorwatt i can help u with ur concentration question
0:08 MY EARSSSSSSSS
sir dont understand thankou
WhY aRe YoU ShOuTiNggggggg
Your class sounds kinda bored... or am I just cynical
n1
0:20 fart lol
stop yelling and then going quiet
Hindi me bolo yrr
Please speak in hindi
Bro why are you shouting