Year 12s: what will be the first way you research your future options? >>

Edexcel IAL Chemistry Unit 3 WCH03 May June 2016 Discussion

Scroll to see replies

a.adi1998

i wrote the value of combustion of c2 sth 1200 and i didnot write the sign will they remove the mark and even in the table i did not write the sign

Reply 121

don't cry-craft

Original post by AlonsoAMG

wouldn't mass give a large uncertainty since it was rounded to the nearest 100g tho?

Isn't uncertainties to do with the measuring instruments used? So if a balance was used I'm pretty sure it would not give you the value to the nearest 100g! Usually it's like 0.01g uncertainty for mass.

Reply 122

abz_98

BTW whoever is doing physics have any good advice for unit 3
??

Reply 123

eftio.gea

Guys to test for the iodine is it correct to use starch and it'll turn blue-black??????

Reply 124

Ahmed3651998

I'm getting around 40-44 marks what about u all??

Reply 125

don't cry-craft

Original post by I <3 WORK

Hmm yet again I think that's rather debatable. Like you say I think it just depends on our luck and the mark scheme! :/ I've a feeling that reflux will need to be stated though.

yeah same, but i'm in denial haha :') Oh well, can't change anything now.

Reply 126

Blazyy

Original post by Ahmed3651998

I'm getting around 40-44 marks what about u all??

Ahmed? From minecraft?

Reply 127

a.adi1998

Original post by Hiyoriiki

-1200

i wrote 1200

Reply 128

Ahmed3651998

Original post by Blazyy

Ahmed? From minecraft?

nope?

Reply 129

OnTheHorizon

Original post by don't cry-craft

Hey you might still get a mark since it was like 2 marks.

I know but still.I've already lost like 5 marks in the first question.Water test,Carbonate ion,Due to which wrong equation.

Reply 130

Blazyy

Original post by Ahmed3651998

nope?

Sorry, I had a friend in minecraft back in the days with a name that's almost same as yours

Reply 131

OnTheHorizon

Original post by don't cry-craft

yeah same, but i'm in denial haha :' :wink:

Oh well, can't change anything now.

well in the markscheme it's usually Relux/Heat so I think you'll be fine

Reply 132

AlonsoAMG

Original post by don't cry-craft

true but in part a it says:
mass of coper cup: 300g
mass of coper cup + water: 700g

which is rounded to nearest 100g

Reply 133

Blazyy

Original post by AlonsoAMG

true but in part a it says:
mass of coper cup: 300g
mass of coper cup + water: 700g

which is rounded to nearest 100g

I think it was mentioned as 300.00 and 400.00

Reply 134

a.adi1998

Original post by OnTheHorizon

well in the markscheme it's usually Relux/Heat so I think you'll be fine

i wrote 1200 i didnot write the sign and in the graph i forgot the sign will i lose any mark

Reply 135

don't cry-craft

Original post by OnTheHorizon

I know but still.I've already lost like 5 marks in the first question.Water test,Carbonate ion,Due to which wrong equation.

I feel like many of us messed up the carbonate ion (and therefore the equation) - I mean I did. Don't worry, hopefully the grade boundaries won't be too high. Good luck with your other exams :smile: