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AQA GCSE Chemistry Unit 2 24 May 2012

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Reply 20
Can we try get a unnoffical mark scheme? Like put together all the questions we can remember
Reply 21
I think I put hydrogen oxide instead of hydroxide. Would that still count?
Reply 22
hey the x ion i swear was sodium hydroxide. not just hydroxide.
Reply 23
Original post by osama2
hey the x ion i swear was sodium hydroxide. not just hydroxide.


no it was hydroxide, as alkali's release hydroxide ions no sodium hydroxide . Sodium hydroxide was simply the solution left over
Reply 24
what acid did u get?
I can't remember the questions exactly, but what did everyone write for the stuff on ammonia?

There was one about the yield and pressure.. i can't really remember haha
Reply 26
Yes i'm so happy i wrote 2.43 for the ammonia!!!!!!!!!!11
Reply 27
I found that paper quite hard tbh! Am i the only one. :/


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Reply 28
Original post by Zahirajavaid
How can u make that solution to a solid?

you would evaporate it, to rid the water
Omg I thought it would be something hard and had no idea what to write


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Original post by kkkkkatie
Yes i'm so happy i wrote 2.43 for the ammonia!!!!!!!!!!11


How did u work it out?


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Reply 31
Original post by Hajrah94
I found that paper quite hard tbh! Am i the only one. :/


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So did i :L And i got an A in the jan mock. So im wishing the grade boundries are low!
Reply 32
what acid did everyone put?
Reply 33
Original post by Zahirajavaid
How can u make that solution to a solid?



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you would evaporate the soultion, to rid the water
Reply 34
Original post by osama2
what acid did everyone put?


it was hydrochloric acid
Reply 35
Original post by Zahirajavaid
How did u work it out?


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um it took quite a long time because i did it wrong at first but i did 2/28 = 0.07142851 then 0.07142851 x 34 = 2.43 :-)
Reply 36
Original post by tssf_skye
I can't remember the questions exactly, but what did everyone write for the stuff on ammonia?

There was one about the yield and pressure.. i can't really remember haha


the question asked why yield would increase if pressure increased:
the answer: because there ar eless particles from the forward reaction.

its a classic question and comes up on every past paper, this is exactly what the mark schemes say
Reply 37
what about the last question about oxygen?
Original post by kkkkkatie
um it took quite a long time because i did it wrong at first but i did 2/28 = 0.07142851 then 0.07142851 x 34 = 2.43 :-)


How comes u multiplied it by 34
Sorry it's just I can't remember what answer I got I only remember how I worked it out


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Original post by Princess008
what about the ion question . what x is ion alkaline something like that?


Alkaline was OH- ions,
and the other one about the Ph being 1, was H+ ions.

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