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Edexcel IAL Chemistry Unit 3 WCH03 May June 2016 Discussion

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Reply 280

AlvlVictim

Why was minor not produced?
Whats the answer to dis?

Reply 281

OnTheHorizon

Dammit I haven't even started preparing for tomorrow,I'll start now.

Reply 282

notsoclueless

Original post by OnTheHorizon

idk if only granules is correct or not because a classmate of mine suggested that there are many types of granules or something.Maybe it'll be accepted or maybe not.
I think fractionating column is wrong,I wrote the same thing.

It was simple distillation wasn't it? not fractional distillation? I wrote horizontal condenser. Do you think that's correct?

Reply 283

Hamadtype-

Original post by Saad69

Why was minor not produced?
Whats the answer to dis?

I Wrote most of it got oxidized :biggrin:

Reply 284

notsoclueless

Original post by OnTheHorizon

Dammit I haven't even started preparing for tomorrow,I'll start now.

Best of luck

Reply 285

OnTheHorizon

Original post by notsoclueless

It was simple distillation wasn't it? not fractional distillation? I wrote horizontal condenser. Do you think that's correct?

I honestly have no clue but I think it's simple,Otherwise fractionating column should be correct.Horizontal condenser is not an ADDITIONAL piece of apparatus,It IS a condenser.

Reply 286

Hamadtype-

Original post by OnTheHorizon

Dammit I haven't even started preparing for tomorrow,I'll start now.

I have no idea how to prepare for physics unit 3 exam, except for pastpapers, ive done them all, and I except a surprise from edexcel to **** up the test like the chemistry one

Reply 287

notsoclueless

Original post by Saad69

Why was minor not produced?
Whats the answer to dis?

The carbocation in the intermediate stage was secondary so the secondary halogenoalkane formed would be more stable. Hence, less of F would be produced.

Reply 288

OnTheHorizon

Original post by Hamadtype-

I have no idea how to prepare for physics unit 3 exam, except for pastpapers, ive done them all, and I except a surprise from edexcel to **** up the test like the chemistry one

Ahaha Yeah,I honestly usually lost 1 or 2 marks in the previous past paper question 1 with the blanks.Here I lost 5 out of 10

Reply 289

Hamadtype-

Original post by notsoclueless

It was simple distillation wasn't it? not fractional distillation? I wrote horizontal condenser. Do you think that's correct?

Its just distillation, fractional distillation have canals in in them to separate in different temps,

Reply 290

notsoclueless

Original post by OnTheHorizon

I honestly have no clue but I think it's simple,Otherwise fractionating column should be correct.Horizontal condenser is not an ADDITIONAL piece of apparatus,It IS a condenser.

Oh well. At least I'm getting the two other marks :P
(Look at me trying to be all optimistic) :P

Reply 291

OnTheHorizon

There are some unit 3 notes on one of the TSR threads.

Reply 292

OnTheHorizon

So far Let's see how many have I lost,5 from 1st question,The technique name is probably wrong,And the condenser justification I reckon I'll get 1/2 and I believe I'll get atleast 2 marks on the last question.My temp. range was wrong,I lost 1 mark in an explanation and another for 1 incorrect modification.
So that's -14 marks I believe.But I believe I'll still get 30+ at the very least.So I think it's safe to assume I'll get a B and maybe an A

Reply 293

don't cry-craft

Original post by notsoclueless

We weren't asked about why the water flows that way. They did ask us about what the Liebig condenser was and what is it's purpose and that was 2 marks.
Calculate kj per mole was 3 marks. And Labelling was 2 marks. 1 mark was for naming the process.

Also the drawing the major product was only 1 mark not 2.

Reply 294

don't cry-craft

Original post by OnTheHorizon

i think it is anti-bumping granules

Reply 295

OnTheHorizon

Original post by don't cry-craft

i think it is anti-bumping granules

Yes that is the correct answer obviously I wrote the same thing but I'm not sure about just granules.

Reply 296

don't cry-craft

Original post by I <3 WORK

Guys are these the correct order, questions and marks for the exam? It adds up to 50 but I've got a feeling I've missed some questions/ overestimated marks - so if you recognise any please tell me:

Flame test experiment (3 marks)
Name lilac cation (1 mark)
Name gas produced CO2 (1 mark)
Test for water (2 marks)
Name anion HCO3 (1 mark)
Write reaction including state symbols (2 marks)
Name E (1 mark)
Observation of -OH testing (2 marks)
Testing for iodine (2 marks)
Potassium manganate change (2 marks)
Draw the product (diol) (1 mark)
Draw carboxylic acid and aldehyde (2 marks)
IR spectra (2 marks)
Draw major product (2 marks)
Why was minor not produced? (2 marks)
Label reflux equipment (3 marks)
Why water flow used that way? (2marks)
How to change equipment for distillation (3 marks)
Name drying agent (1 mark)
Calculate energy transferred in enthalpy experiment (2 marks)
Calculate kJ per moles (2 marks)
Draw and label graph (2 marks)
Find enthalpy for C2H5OH (1 mark)
Explain why trend shown (2 marks)
Calculate percentage error (2 marks)E
valuate method and validity (4 marks)

You also missed out the question about the reagent and conditions needed to covert the halogenalkane to alkene which was 2 marks. there was also a question about the temperature range you would use for the distillation. I think that was 1 mark, not sure about that.