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Edexcel IGCSE Chemistry | PAPER 1

Light of Truth

How is everyone feeling for Monday? :K:

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Reply 1

hxnnxh_13.11.06

Not good, I have 2 Spanish exams clashing with it as well so I have to do chem after those :cry:

Reply 2

Cardinally

Not good. Im trying to revise but im so tired and feeling kinda bad. Its only my 4th exam and i am already over it lol

Reply 3

kmat1893

Original post by Cardinally

Not good. Im trying to revise but im so tired and feeling kinda bad. Its only my 4th exam and i am already over it lol

I reccommend watching the science with hazel chemistry video, it is a full video on the whole spec, it is only 3 hours, take little breaks in between and do loads of past papers and you should be fine

Reply 4

rabiiii379

i have geography the same day some1 help me bruh

Reply 5

kmat1893

Original post by rabiiii379

i have geography the same day some1 help me bruh

You going to pull an allnighter lol

Reply 6

AtlasC

That was so good wow

Does anyone know if we were supposed to use 14.7 or 15 for the delta H? I used 15 and got 3667 kJ/mol

Reply 7

amm89

Original post by AtlasC

That was so good wow

Does anyone know if we were supposed to use 14.7 or 15 for the delta H? I used 15 and got 3667 kJ/mol

I used 14.7 what did you get for the moles of pentanol was it 4.0909 x10^-3 something like that

Reply 8

AtlasC

Yes it was 0.004090909

Reply 9

amm89

Original post by AtlasC

Yes it was 0.004090909

Okok what did you get for x loads of people said 10 and I got 4. Can you explain how you got 10

It is 10

Can we also chat about the upcoming physics paper on Thursday ?

Reply 12

pewpepwpe

Original post by amm89

Okok what did you get for x loads of people said 10 and I got 4. Can you explain how you got 10

well find the ratio first which is 1 : x
then you find mol of h2o and also na2so4 (something like that)
and u divide both side by the num mole of na2so4 you will end up having 10

Reply 13

rabiiii379

what was the one about pentanol i think it was like 2 marks, how did u get the answer?

Reply 14

pewpepwpe

Original post by rabiiii379

what was the one about pentanol i think it was like 2 marks, how did u get the answer?

i wrote 2c5h11oh + 15o2 -> 10Co2 + 12h2o

Reply 15

rabiiii379

Ohhh wait i mean the question when it gave you like a temp which was 30 degrees and it like asked prove that zinc was in excess or something

Original post by pewpepwpe

i wrote 2c5h11oh + 15o2 -> 10Co2 + 12h2o

Reply 16

tyyyyttytyggg

Original post by rabiiii379

Ohhh wait i mean the question when it gave you like a temp which was 30 degrees and it like asked prove that zinc was in excess or something

ughh Is probably just find the ratio between 2 compound and show that the ratio isnt 1:2

Reply 17

itayrofe

Original post by pewpepwpe

i wrote 2c5h11oh + 15o2 -> 10Co2 + 12h2o

My friend wrote what you wrote but i am fairly certain that you had to have 7.5 for the O2. it is a bit counter-intuitive but I pretty sure it's the answer dude.

Reply 18

tyyyyttytyggg

Original post by itayrofe

My friend wrote what you wrote but i am fairly certain that you had to have 7.5 for the O2. it is a bit counter-intuitive but I pretty sure it's the answer dude.