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

Roha125
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#1
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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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HPAaxis
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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.
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Roha125
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(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
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HPAaxis
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(Original post by Roha125)
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
DUDE! SPOILER ALERT!!! Come on man.
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Roha125
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(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
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Roha125
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(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
Attached files
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AndrewJoji
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How did you guys find it?
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Oyu
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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?
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Jiihamza
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3.7
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Jiihamza
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Because I divided the concentration of NaOH by 2 as they told total volume
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Oyu
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Then how did you calculate the pH
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Icon567
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Guys what did you get for the buffer solution pH question 5 marker
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Jiihamza
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(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
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Oyu
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(Original post by Icon567)
Guys what did you get for the buffer solution pH question 5 marker
Got 4. Something
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Oyu
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(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
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Jiihamza
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#16
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(Original post by Icon567)
Guys what did you get for the buffer solution pH question 5 marker
4.89?
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Icon567
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(Original post by Oyu)
Got 4. Something
Hey was it 4.65?
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Oyu
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(Original post by Icon567)
Hey was it 4.65?
Yeah. Something like that
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Roha125
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#19
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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?
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Jiihamza
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I got 4.89
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