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# Edexcel IGCSE Chemistry Paper 2 Topics 15th June 2016

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1. to speed up rate at which solid dissolves at i think
2. This paper was easy as hell... NO mistakes ... Where is the Poll station.....i tick marked 3 boxes in titration question..last 3
3. (Original post by aaljhfgahsj)
calculations:

the concordant results was 22.53 (recurring)

2.75g for mass of co2
and 1500cm3 for volume
(i think thats all there was)
yessss i got all those!
4. IT WAS SO HARD!!!!! Oh my god I LOST SO MANY MARKS ON THIS PAPER!!!
5. (Original post by meme259)
Why did the student heat/warm the acid? In the question about making salts.
I put because increasing the temperature increases the rate of reaction.

On the first page, what did everyone get for the piece of apparatus labelled A? I put "glass rod" but others have put "stirrer" and "thermometer".... Also, was the mixture of sand, salt and water a solution or suspension?
6. (Original post by F0X)
I put because increasing the temperature increases the rate of reaction.

On the first page, what did everyone get for the piece of apparatus labelled A? I put "glass rod" but others have put "stirrer" and "thermometer".... Also, was the mixture of sand, salt and water a solution or suspension?
yeah i put 'stirrer' but I feel like the correct answer is 'glass rod'

the mixture was a solution because it said 'what is the clear liquid in stage A' - and NB not 'what is the substance in stage A' or anything like that

also I believe that the temperature question, as well as rate of reaction, may have been related to the fact that copper is extremely unreactive, but maybe not given that copper oxide is obviously a different substance
7. (Original post by Martins1)
q = change in temperature * mass of water * 4.18
n = mass burnt * Mr
molar enthalpy change = -q/n
Haha thanks
How was the paper?
8. (Original post by umang-23)
Haha thanks
How was the paper?
Good thanks - other than the question about incomplete combustion which I messed up in the exam and as soon as I walked out the hall I could solve it... ughhh. But yeah otherwise pretty good thx

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Updated: June 15, 2016
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