IAL Chemistry Edexcel Unit 4 & 5 June 2015

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Reply 20

Elolel

Original post by IH09

Wait. Which part of the paper included k???

The part where u find order of X nd B

Reply 21

IH09

Oh you meant the rate constant. Phew.

Reply 22

bluegreenjade

Original post by Elolel

Its okay i do that alot aswell! Its only 1 mark! Nd the ph is for NH3 nd HCL i guess

yeah thats true I'm flipping out over the one mark just feel like it'll all add up & accumulate from here and there you know. Ah well, good luck for chem 5 everyone :smile:

Reply 23

IH09

I put in O2 at GLC. I dont think co2 is inert, esp. If it dissolves in water. :frown:

Why was the temp. low inthe ester question? And what catalyst did you use in the question about oils?

Reply 24

hopefulmed96

Well unit 4 was interesting. Almost no standard questions bar the calculations and a few others.
Hoping that unit 5 will be fairly nice...but it's edexcel so you never know...
Good luck to all of you for all your remaining exams.

Reply 25

bluegreenjade

Original post by IH09

I put in O2 at GLC. I dont think co2 is inert, esp. If it dissolves in water. :frown:

Why was the temp. low inthe ester question? And what catalyst did you use in the question about oils?

yeah not sure where it fits in the syllabus the question didn't say what the sample (that goes in to GC) was did it? didn't know that either :frown:

what did you say?

edit: didn't know the low temp for aldehyde. I put hcl for catalyst

(edited 8 years ago)

Reply 26

hopefulmed96

Original post by IH09

I put in O2 at GLC. I dont think co2 is inert, esp. If it dissolves in water. :frown:

Why was the temp. low inthe ester question? And what catalyst did you use in the question about oils?

for the temperature I think it was something along the lines of so that the aldehyde won't be futher reduced and catalyst was NaOH although I put HCL :frown:

Reply 27

bluegreenjade

Original post by hopefulmed96

for the temperature I think it was something along the lines of so that the aldehyde won't be futher reduced and catalyst was NaOH although I put HCL :frown:

thats basically what I put too, so that the aldehyde won't be reduced by the reducing agent they've mentioned to alcohol. And I think HCl and NaOH can both catalyze it tbh. :smile:

Esters was never my strong point tho so I'm not sure. I actually put HCl or NaOH (panic mode does that to me lol)

Reply 28

IH09

I think i will be losing at least 8 marks. :frown:

So guys, what do you think a score of 79-82 will be on the UMS scale?

XhHei

Original post by IH09

I think i will be losing at least 8 marks. :frown:

So guys, what do you think a score of 79-82 will be on the UMS scale?

Over 100 for sure.

Reply 31

IH09

Original post by hopefulmed96

Over 100 for sure.

I was hoping for over 108 actually. :frown:

Reply 32

Raghadabuali

Guys wat did u choose for the mcq related to microwave radiation ?

Reply 33

hopefulmed96

Original post by IH09

I was hoping for over 108 actually. :frown:

Strictly speaking it should be as it was not a standard paper and since 78 out of 99 was 108 in the exam of January which was a lot easier then yes perhaps it will be even higher. But you can never say with edexcel