Quick Revision - pH titration curve calculations

Three past exam questions covering the pH titration curve topic.

[osarogbe]

You are so helpful. I literally watched this 5 minutes before my OCR paper today, and it came up. Thanks so much!

[sv]

Hi, do you happen to have a quick revision video on structure of graphite, diamond etc. Like their MP.

[t.o]

hi sir,
for Q1)E), how do you know that doubling the concentration will half the equivalence point? thank you!!

[nisargapoudel]

for the second question, how do u know where to draw the equivalence point exactly at like which pH u start?

[oyindamolaadekoya]

In the a level exams, would you recommend doing the multiple choice questions first or last? And how much time time should I spend on the them?

[shaaysd]

why didn't you subtract the moles of KOH with CH3COOH if the KOH is in excess?

[chris]

for q2 - it doesnt mention the temp being 25c so can we assume kw is 1x 10-14 if the question doesnt mention the conditions

[FR-tnqj]

Hi, thank you very much as you predicted this came up. But I am really stressing right now since I have done the curve starting from ACID ph then finished at alkali pH as required but I never drew a curve it was more like 3 straight lines. So I went with a ruler till equivalence point then drew another straight line till final pH. Will I get penalised?

[livyaxx]

hi there, just wondering if the AS 2019 exam papers are available to you?

[timothypopoola]

Im not sure but i think you have made a mistake in the calculation of moles of OH-. Seems to be out by a factor of 10 which would make the answer 12.63 instead of 11.63