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Chemistry Unit 6B [6CH08][Edexcel][International Candidates][10.01.2013]

Yorrap

Exam is next week :colone:

Anyone else doing this?

Exam on Thursday!

I'm doing it!..it seems that it's only us in TSR
Anyway how are you preparing for it?

Reply 3

Yorrap

Original post by tarekmo

I'm doing it!..it seems that it's only us in TSR
Anyway how are you preparing for it?

lol yeah xD

- websites/youtube videos for learning the practical techniques mentioned in the specification like recrystallisation/filtration etc. (I have never done any experiments in chemistry, so I need to watch videos, lol)
- be able to draw apparatus
- unit 4 topic 1 (A2 book) for reaction kinetics experiments (in case they ask again)
- knowing all reactions in unit 4 and 5 (and 1,2) is a good idea
- unit 5 transition metals / colours / hydroxide precipitates
- mass spectrometer/IR/NMR general knowledge from AS/A2 books
- past papers
- reading older unit 6b topics here on tsr
- chemguide.co.uk

Specification
International Specification for Unit 3 & 6

(edited 11 years ago)

exam is tomorrow xD

Hey let's discuss the paper tomorrow, shall we? :smile:

Reply 6

Yorrap

Original post by tanngaifoong

Hey let's discuss the paper tomorrow, shall we? :smile:

So you decided to appear after the exam...

Go ahead and post your answers/questions and I will reply ; )

Reply 7

tanngaifoong

Is it alright for us to discuss the paper now? Has the time restriction been over? By the way, I will be sitting for the international written test for physics unit 6 too! Just noticed you have open a thread for it, see you there after our exam :smile:

How did you find the paper by the way?

Reply 8

Yorrap

Original post by tanngaifoong

How did you find the paper by the way?

Also feel free to post there before the exam.

For Edexcel: morning exams may not be discussed until 12:00 midnight (UK time) and afternoon exams until 4:30 AM (UK time). There are different rules in place for Edexcel ICT exams as these can be sat over several weeks.

so only 19 minutes left, lol
Tell me first what do you think? (after 19mins) xD

Reply 9

tanngaifoong

Original post by Yorrap

oh okay sure. XD
Only less than 4 days left for preparation for physics 6. Gosh.
Didnt really study enough for it.

Reply 10

Yorrap

Original post by tanngaifoong

oh okay sure. XD
Only less than 4 days left for preparation for physics 6. Gosh.
Didnt really study enough for it.

are you self teaching at home or going to school/college?

Reply 11

tanngaifoong

Original post by Yorrap

are you self teaching at home or going to school/college?

Oh I have been attending a college.

This Jan exam will be my final exam, finishing up all the A2 papers remaining haha. Then I'm officially graduated.

Where are u from? I'm from Malaysia.

Reply 12

Yorrap

Original post by tanngaifoong

Oh I have been attending a college.

This Jan exam will be my final exam, finishing up all the A2 papers remaining haha. Then I'm officially graduated.

Where are u from? I'm from Malaysia.

I am in europe (of course not UK), self teaching at home (never attended a school/college).

As far as I know, you guys now have to do experiments at school, so what did you guys do, or better I should ask 'did you guys do anything' lol

Reply 13

tanngaifoong

Original post by Yorrap

Yea we do carry out practicals for all the science subjects. Our school labs are quite well-equipped.

Reply 14

Yorrap

Original post by tanngaifoong

Yea we do carry out practicals for all the science subjects. Our school labs are quite well-equipped.

Did that help?
done anything similar to todays questions?
I am taking these exams with zero practicals, lol

Reply 15

Yorrap

we can discuss now btw

"lipton600' asked me something from the first question here;
http://www.thestudentroom.co.uk/member.php?u=910561

(edited 11 years ago)

Reply 16

tanngaifoong

Original post by Yorrap

we can discuss now btw

"lipton600' asked me something from the first question here;
http://www.thestudentroom.co.uk/member.php?u=910561

The paper was okay, of moderate difficulty I suppose.

For the first question, I concluded straight it was Fe2+ by looking at the pale green appearance. In fact that's what I wrote for the inference.
My answers for question 1 in the correct sequence, briefly:

The cation present is Fe2+
The reaction is deprotonation, casuing the pH 6 in water.
NaOH as a base.
Fe(OH)2
The reaction which occured was oxidation.
Fe(OH)3
The hydroxide is NOT amphoteric.
BaSO4 is the white precipitate.
Compound A is FeSO4

Any numbers/figures that you can recall from your answers?

I got the percentage yield to be 57% in 2 sf.

And I found the concentration of sodium dichromate to be 8.29X10^-3 mol dm-3

(edited 11 years ago)

Reply 17

lipton600

You mean its NOT amphoteric.
What bout the bumping question eh.. what did you guys put for that

Reply 18

Yorrap

Original post by tanngaifoong

The paper was okay, of moderate difficulty I suppose.

For the first question, I concluded straight it was Fe2+ by looking at the pale green appearance. In fact that's what I wrote for the inference.
My answers for question 1 in the correct sequence, briefly:

The cation present is Fe2+
The reaction is deprotonation, casuing the pH 6 in water.
NaOH as a base.
Fe(OH)2
The reaction which occured was oxidation.
Fe(OH)3
The hydroxide is amphoteric.
BaSO4 is the white precipitate.
Compound A is FeSO4

Any numbers/figures that you can recall from your answers?

I got the percentage yield to be 57% in 2 sf.

And I found the concentration of sodium dichromate to be 8.29X10^-3 mol dm-3