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A Level Chemistry - 23 - Acids, bases and buffers
Рет қаралды 15,991
7 жыл бұрынThe twenty-third of the topics in OCR A Level Chemistry. Any questions, or if you want me to make a specific video about something I didn't cover in enough detail, write it in the comments below.
Thanks for watching :)
@ryker4688 2 ай бұрын
Running through these videos for the paper 1 on Monday. Really appreciate the videos. Thank you.
@fizchoywinters8706 5 жыл бұрын
I’ve struggled with this topic for ages, but you explained it so well that I understood everything after this video. Thank you so much!
@debs.a1714 6 жыл бұрын
Very helpful! Thank you. I will definitely recommend your channel to all my chemistry buddies
@pwincezzetz 7 жыл бұрын
This is perfect timing!!!!
@Ismaaaaaael 5 жыл бұрын
amazing vid this helps so much
@eesha5906 5 жыл бұрын
Thank you so much! Great video!!
@Letik3x 6 ай бұрын
How did you get 0.00500moles for NaOH from 50cm^3 and 0.100M ?
@maanamaow6188 2 ай бұрын
Change cm^3 into dm^3 then times the moles by the volume
@jaswantbhatti4329 6 жыл бұрын
What about pKa?
@ahmedsheraz8990 4 ай бұрын
Hi, this may sound silly but at 21:19 how do you get 0.01 moles of ch3cooh and 0.005 moles of naoh?
@joshwood1333 6 жыл бұрын
what about pKa values? is it simply just the lower the Pka value the stronger the acid?
@CCrohny 6 жыл бұрын
Yeah.
@sajithasunil1419 5 жыл бұрын
why are you using the number of moles of ethanoic acid instead of the concentration of the acid for the Ka equation?
@wmfw3804 Жыл бұрын
Hi there, I know this is an old video but I thought when you add OH- to a buffer the OH- reacts with the H+ rather than HA to produce water, is this not correct? Please advise
@dunkley217 Жыл бұрын
It can react with either, but there are many orders of magnitude more HA than H+, so it is more useful to consider this. If you were to consider it reacting with the H+, only a small amount would react and then the H+ would run out. To replace the H+, more HA would dissociate. The outcome would be that the amount of HA would reduce by the same as the amount of OH- that was introduced. In short, just react the OH- with the HA 🤣
@wmfw3804 Жыл бұрын
@@dunkley217 haha thanks alot!! Its just because my teacher taught us to react the OH- with the H+ to form water but i do think ur explanation works alot better
@emilyzerrinbell8998 6 жыл бұрын
Do we need to know which indicators must be used for the exam?
@CCrohny 6 жыл бұрын
Yah. Indicators change around different pH's The 3 main indicators you need to know for OCR chem Methyl Organe phenolphthalein bromothymol blue
@emilyzerrinbell8998 6 жыл бұрын
pleb 1 thank youuu
@willgrant9639 6 жыл бұрын
Do you have to state your assumptions that you make when doing weak acid calculations? Thank you :)
@aliyanadeem4740 4 жыл бұрын
If they ask specifically if not then you don’t have to
@maxjones3173 7 жыл бұрын
Daddy Dunkbro
@simplezgoof 6 жыл бұрын
Acid Daddy
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