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Chemistry iGCSE paper 1 Edexcel (May 2016)

How did it go?

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Very easy, you?
Mm... It was an odd paper. Not much knowledge needed, but quite easy to drop marks I think...


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Original post by metellaest
Mm... It was an odd paper. Not much knowledge needed, but quite easy to drop marks I think...


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Can you think of some questions, trying to form an unofficial mark scheme.
what questions were you guys unsure about??
Reply 5
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RivenLPL
Original post by alic12345
what questions were you guys unsure about??


The last solid in the Calcium compounds question, was it Calcium Carbonate?
Original post by RivenLPL
The last solid in the Calcium compounds question, was it Calcium Carbonate?

yep
Reply 7
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RivenLPL
Original post by alic12345
yep


Hmm I hope so
Original post by RivenLPL
Hmm I hope so


it was
Reply 9
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RivenLPL
Original post by conradliebers
it was


ok great! By the way hows the mark scheme making going?
what did u guys get for the maximum mass of water? and why the solid was ground up before adding to the water
Original post by RivenLPL
ok great! By the way hows the mark scheme making going?


http://www.thestudentroom.co.uk/showthread.php?t=4098953
Original post by alic12345
yep


I thought it was calcium hydrogencarbonate, because hydrogen was present and it didn't say that any other product formed
I thought the delta H questions were a little confusing...


And solution Y! Why swill it out? A friend explained it to me and I'm hitting my head now but at the time...:s-smilie:
Original post by alic12345
what did u guys get for the maximum mass of water? and why the solid was ground up before adding to the water


0.9 g.

Which question number was this so I can fill it in.
Original post by conradliebers
0.9 g.

Which question number was this so I can fill it in.
\
sorry i can't remember
Original post by RivenLPL
The last solid in the Calcium compounds question, was it Calcium Carbonate?
yes i put Calcium carbonate
Reply 17
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RivenLPL
Original post by gabrieleluberti
yes i put Calcium carbonate


Actually it's probably Calcium Hydrogen Carbonate... There were no other products so it had to be an addition reaction, rip.
Alot of other people I've talked to irl (who know their chemistry) say it was that. Ah well ^^
Original post by RivenLPL
Actually it's probably Calcium Hydrogen Carbonate... There were no other products so it had to be an addition reaction, rip.
Alot of other people I've talked to irl (who know their chemistry) say it was that. Ah well ^^


Its calcium hydrogencarbonate when it becomes clear again


Thought the paper was generally easy. BUT SOOOO MANY LITTLE ANNOYING PESKY GODDAMN DETAILS.
Reply 19
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RivenLPL
Original post by ChocolateCosmos
Its calcium hydrogencarbonate when it becomes clear again


Thought the paper was generally easy. BUT SOOOO MANY LITTLE ANNOYING PESKY GODDAMN DETAILS.


agreed ^^

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