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Edexcel IAL Chemistry Unit 3 WCH03 May June 2016 Discussion

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Reply 180

Does anyone remember the order and questions on the second page - like question 2?

Reply 181

IAROX15

Original post by ToxicPhantom007

Wtf is a carbocation ?

A carbon atom which has a charge in a molecule.

Reply 182

Hamadtype-

Original post by notsoclueless

I got the same answer :/ Turns out I was wrong because there were square brackets around the equation :/ Like
[ (0.39 x mass of copper something) + (4.2 x mass of water)] x T
so it would be [ (0.39 x 300) + (4.2 x 400) ] x 12
:frown:

lets hope they accept our answer :biggrin:

Reply 183

notsoclueless

I wrote Water inlet at the bottom, water outlet at the top and anti bumping granules. The next part I wrote that it was Reflux condensing. For the apparatus needed, I wrote horizontal condenser, thermometer and beaker.

Original post by OnTheHorizon

What about the diagram completion? I wrote anti-bumping granules and condensation for technique(Which I believe is wrong)
And the 3 modifications? I wrote Thermometer,Beaker/Flask and fractionating column(I think this is wrong as well)

Reply 184

IAROX15

Original post by Blazyy

2-Iodohexane is the major product.

did we have to name the product??

Reply 185

Polpi

Original post by don't cry-craft

The reagent is alcoholic potassium hydroxide, but the condition I think is heating. Not too sure about the condition.

Heat under reflux

Reply 186

notsoclueless

Ikr :P

Original post by Hamadtype-

lets hope they accept our answer :biggrin:

Reply 187

IAROX15

The graph question: was it a bar graph or a line graph?

Reply 188

notsoclueless

Original post by IAROX15

did we have to name the product??

Nopes ^_^ They just said to draw the structure of it

Reply 189

NNB_Herath

Original post by OnTheHorizon

even i wrote anti-bumbing granules.... and water in ,... and water out

Reply 190

notsoclueless

Original post by IAROX15

The graph question: was it a bar graph or a line graph?

Line graph

Reply 191

IAROX15

Original post by OnTheHorizon

I wrote that heat loss and incomplete combustion were valid.As the sig figs and uncertainty of measuring instruments was too low for a 41% error

I don't get how incomplete combustion was valid?

Reply 192

Original post by I <3 WORK

Does anyone remember the order and questions on the second page - like question 2?

As in the first question after the hydrogen carbonate decomposition one?

Reply 193

alevels2k17

Original post by ToxicPhantom007

Really ? I got around 41 %

Wasn't this like that ----> (1367.3-800)/1367.3 x 100= 41 %

Anyways this paper was so ****

yeah u are correct.. and hell yes it was

Reply 194

IAROX15

Original post by don't cry-craft

The reagent is alcoholic potassium hydroxide, but the condition I think is heating. Not too sure about the condition.

I put reflux and ethanol for the conditions :frown:

Reply 195

OnTheHorizon

Original post by IAROX15

I don't get how incomplete combustion was valid?

Well the mass was already quite small(1.65),It could be that some of it was left lets say idk 0.30 which may not have been enough to provide fuel for the flame or something along those lines I think.Whether the justification is correct or not,It is valid because incomplete combustion is capable of that large percentage error.

Reply 196

IAROX15

Original post by notsoclueless

Line graph

But the x-axis was discrete data. How could that be a line graph?

Reply 197

alevels2k17

Original post by Hamadtype-

lets hope they accept our answer :biggrin:

wait why is that wrong , i did the same

Reply 198

OnTheHorizon

Original post by notsoclueless

No I think its only 1 for balancing.So you would get 1/2 for the question.

Like I mean, I didn't write K2CO3 at all. I wrote K2O instead :/

Then yeah probably.It was 2 marks which is usually either 1 mark for both correct reactants,products and states and 2nd for balancing or any other combinations.