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8CH02 Paper 2 EDEXCEL CHEMISTRY Friday 10th June 2016

How's everyone feeling about Unit 2? Unit 1 wasn't bad
A very useful youtube channel is:
β€’Erintoul


Some very useful links:
β€’ http://www.physicsandmathstutor.com/chemistry-revision/
β€’ http://www.chemguide.co.uk

If you guys would like to share some useful revision sites or techniques, feel free to do so!

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In. @Tank Girl can you move this to the chemistry forum?
How did everyone find it? 😭😭😭
Original post by Florent venhari
How did everyone find it? 😭😭😭


Welll....let's just say it didnt go too great....
It wasn't that bad, but a few questions were weird and I ran out of time 😭

How did you find it?
Reply 4
I thought the calculations were really bad. what did you get for n?


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Original post by Kazemaru99
Welll....let's just say it didnt go too great....
It wasn't that bad, but a few questions were weird and I ran out of time 😭

How did you find it?


It was awful! The 6 marker was great! But some of the calculations annoyed me 😭😭 I got n as 2.25. πŸ˜‚πŸ˜‚πŸ˜‚????? That percentage yield was awful. I guessed and got 39.1% lol! I hope the grade boundaries are low.

Some of the questions are soo similar to the 2016 unit 3 IAL PAPER ! Like drawing the seperating funnel πŸ˜‚ But I give up with chem! Defo dropping it next year!
(edited 7 years ago)
Original post by samoo311
I thought the calculations were really bad. what did you get for n?


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I got 2.25(6) 😭😭
Original post by Florent venhari
It was awful! The 6 marker was great! But some of the calculations annoyed me 😭😭 I got n as 2.25. πŸ˜‚πŸ˜‚πŸ˜‚????? That percentage yield was awful. I guessed and got 39.1% lol! I hope the grade boundaries are low.

Some of the questions are soo similar to the 2015 unit 3 IAL PAPER ! Like drawing the seperating funnel πŸ˜‚ But I give up with chem! Defo dropping it next year!


Oh my gosh I 100% agree with the calculations :frown:
The paper was just weird πŸ˜‚ I used to think I was alright at chemistry but I guess not xD

Ughhh I wish I could drop it, but i desperately need to drop physics πŸ˜‚πŸ˜‚
Reply 8
Original post by Florent venhari
I got 2.25(6) 😭😭


I got 5 😭😭😭 I even got the percentages wrong at 32%


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Original post by Kazemaru99
Oh my gosh I 100% agree with the calculations :frown:
The paper was just weird πŸ˜‚ I used to think I was alright at chemistry but I guess not xD

Ughhh I wish I could drop it, but i desperately need to drop physics πŸ˜‚πŸ˜‚


I didn't even want to do this *****y subject! I had to chose it in order to save my self from doing English! πŸ˜‚πŸ˜‚
Original post by samoo311
I got 5 😭😭😭 I even got the percentages wrong at 32%


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Don't worry about it; I didn't even have time to answer that question 😁 I'm sure you'll get some at least πŸ‘
Original post by Florent venhari
I didn't even want to do this *****y subject! I had to chose it in order to save my self from doing English! πŸ˜‚πŸ˜‚


Ahaha I feel for you πŸ˜‚ 😭 I'm gonna have to change all of my plans for which unis to apply for now!
I got n=2.25 so I rounded it down to 2 as it had to be a whole number. I'm not sure if it's right, but the fact that it's not a whole number is explained by the question after, so maybe it is.
Original post by Kazemaru99
Don't worry about it; I didn't even have time to answer that question 😁 I'm sure you'll get some at least πŸ‘


Ugh I hope so do you remember how many marks the yield question was?


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Original post by samoo311
I got 5 😭😭😭 I even got the percentages wrong at 32%


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5 seems correct! This is what I did:

Moles of NaOH = 0.103x16.20/1000 =0.0016686
Moles of H2C2O4 = 0.0016686/2 = 0.0008343 mol
Moles in 250 cm3 = answer x 10 = 0.008343
Mass of H2C2O4 = 90 x 0.008343 = 0.75087 g
Mass of Water = 1.09 - 0.75087 then I did empirical formula then got n as being 2.25 😭😭 I hope I didn't read the concentration wrong
(edited 7 years ago)
Original post by Astro_Joe
I got n=2.25 so I rounded it down to 2 as it had to be a whole number. I'm not sure if it's right, but the fact that it's not a whole number is explained by the question after, so maybe it is.


I got that!!! It doesn't have to be a whole number. I think the 2016 IAL UNIT 3 paper for January had a similar question and n was a decimal
Reply 16
Original post by Florent venhari
5 seems correct! This is what I did:

Moles of NaOH = 0.103x16.20/1000 =0.0016686
Moles of H2C2O4 = 0.0016686/2 = 0.0008343 mol
Moles in 250 cm3 = answer x 10 = 0.008343
Mass of H2C2O4 = 90 x 0.008343 = 0.75087 g
Mass of Water = 1.09 - 0.75087 then I did empirical formula then got n as being 2.25 😭😭 I hope I didn't read the concentration wrong


I did the exact same too! Should be worth a couple either way... We can only hope
Original post by Florent venhari
I got that!!! It doesn't have to be a whole number. I think the 2016 IAL UNIT 3 paper for January had a similar question and n was a decimal


Ah, I see! That makes me hopeful - perhaps they'll ignore the fact that I rounded it to 2. :smile:
What was the reagent and the conditions????

I wrote:
KMnO4 lol I guessed. I thought it makes a diol so..... And 50% H2SO4 (that's wrong)

For conditions I wrote hot and ethanol as solvent. I should have written down REFLUX 😭😣😣


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Reply 19
Original post by Florent venhari
What was the reagent and the conditions????

I wrote:
KMnO4 lol I guessed. I thought it makes a diol so..... And 50% H2SO4 (that's wrong)

For conditions I wrote hot and ethanol as solvent. I should have written down REFLUX 😭😣😣


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Was is H2S04 and K2Cr2O7 and then heating under reflux?

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