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Chemistry Unit 4 IAL(new syllabus)Discussion Group.13th January 2020

Anyone doing IAL Chemistry Unit 4 new syllabus(old syllabus can also join)

How's prep going and what are you focusing most on for revision.
How's was AS exams and what did you get.

Leave any predictions for Unit 4
Ask for help if you have any problem on any topics

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Reply 1

HPAaxis

Hi, I am doing Unit 4 new spec. I feel quite confident. I am mainly concerned about drawing pH graphs and making silly mistakes. Otherwise the material is pretty straight forward.

Reply 2

Roha125

Original post by HPAaxis

Hi, I am doing Unit 4 new spec. I feel quite confident. I am mainly concerned about drawing pH graphs and making silly mistakes. Otherwise the material is pretty straight forward.

Yep same here
Can't get rid of silly mistakes.

I just did the sample material.I saw the question about clock reaction,isn't iodine thiosulfate reaction moved to unit 5 then how come in sample of unit 4

Reply 3

HPAaxis

Original post by Roha125

DUDE! SPOILER ALERT!!! Come on man.

Reply 4

Roha125

Original post by HPAaxis

DUDE! SPOILER ALERT!!! Come on man.

Sorry
Exam is in 1 day so I thought everybody has done the sample
Let me know how much you get.I got 78 for many silly mistakes

Reply 5

Roha125

Original post by HPAaxis

Hi, I am doing Unit 4 new spec. I feel quite confident. I am mainly concerned about drawing pH graphs and making silly mistakes. Otherwise the material is pretty straight forward.

Do you how they got B

Screenshot_2019-12-09-20-41-46.png115.7KB

Reply 6

AndrewJoji

How did you guys find it?

Reply 7

Oyu

Solid exam to be honest.

Original post by AndrewJoji

How did you guys find it?

Solid exam to be honest. Can't complain at all. What was your pH for the ester and NaOH hydrolysis question?

3.7

Because I divided the concentration of NaOH by 2 as they told total volume

Reply 10

Oyu

?
Then how did you calculate the pH

Reply 11

Icon567

Guys what did you get for the buffer solution pH question 5 marker

Reply 12

Jiihamza

Original post by Oyu

?
Then how did you calculate the pH

Bro they gave Ka 1x10*-14 so just use concentration of H ion multiply by concentration of OH- ions equals Ka

Reply 13

Oyu

Original post by Icon567

Guys what did you get for the buffer solution pH question 5 marker

Got 4. Something

Reply 14

Oyu

Original post by Jiihamza

Bro they gave Ka 1x10*-14 so just use concentration of H ion multiply by concentration of OH- ions equals Ka

Yeah I wasn't too sure

Reply 15

Jiihamza

Original post by Icon567

Guys what did you get for the buffer solution pH question 5 marker

4.89?

Reply 16

Icon567

Original post by Oyu

Got 4. Something

Hey was it 4.65?

Reply 17

Oyu

Original post by Icon567

Hey was it 4.65?

Yeah. Something like that

Reply 18

Roha125

Didn't go that well for me
Was short of time but was able to finish it by taking extra 2mins as invigilator was collecting other students papers,as I rushed it I think I have done many silly mistakes.

Even I got 4.65 but 2 of my friends got 4.89.I don't know which is correct

Original post by Icon567

Hey was it 4.65?