Edexcel A2 Chemistry 6ch04/05 JUNE 2015

For the question regarding the addition of the acid to the jelly, could you say that the jelly becomes less sweeter, instead of saying it makes it more sour?

Reply 1381

neverstop

2

Original post by Nautic4l

Esterification + H2SO4?

MCQ about microwave I put whichever was the alcohol?

Yep I put that but I said conc H2S04 .

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Reply 1382

Wahid1

7

Original post by neverstop

For the multiple choice , which one isn't chiral I put B , the ring alkane with a methyl group?

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I concur

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Reply 1383

Nautic4l

12

Original post by MoHoosen9167

For the outliers, I said that some of B may have reacted and therefore increased the rate?

I said that

What about the 3/4 marker saying why the aspic acid or whatever will give a bigger yield if temp is decreased?

Reply 1384

MoHoosen9167

10

Original post by neverstop

For the multiple choice , which one isn't chiral I put B , the ring alkane with a methyl group?

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I put that, because the groups on either side are the same?

Reply 1385

HappyCheesecake

8

Original post by MoHoosen9167

Yup, for MgCl2

I got D for that one (not sure about the value). -1921+(2x-340) or something for the calculation :/

Reply 1386

Nautic4l

12

Original post by Medboy100

For least suitable gaseous phase, what was it?

Oxygen or Carbon dioxide

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I put CO2 but I've just looked online and I think it's O2

Reply 1387

MoHoosen9167

10

Original post by HappyCheesecake

I got D for that one (not sure about the value). -1921+(2x-340) or something for the calculation :/

Yeah, you got the same as me! I threw it into google and checked :smile:

Reply 1388

rasil23

3

Original post by MoHoosen9167

I put CO2 because oxygen, Nitrogen and the other one were all suitable idk?

co2 doesnt react with them
the only non-suitable gas is oxygen

Reply 1389

MoHoosen9167

10

Original post by Nautic4l

I said that

What about the 3/4 marker saying why the aspic acid or whatever will give a bigger yield if temp is decreased?

I got my entropy all wrong (a negative total) so my answer to that would be all wrong.

Reply 1390

neverstop

2

Which one increased the equilibrium yield of CN? I swear they were trying to catch us trying to make us pic KCN because that's what we learn but I actually chose KOH because of the way OH reacting with H and therefore equilibrium moves to right ? Or maybe the answer is KCN?

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Reply 1391

cerlohee

16

Original post by MoHoosen9167

What did you guys say a reason for the data being useful? I said because [X] changes so it tells you whether or not [X] has an effect on the rate?

I said reliability #FailingAtTryingToReplicatejune2014answers

(edited 8 years ago)

Reply 1392

HappyCheesecake

8

Original post by MoHoosen9167

Yeah, you got the same as me! I threw it into google and checked :smile:

Yayyy, I got something right in multiple choice :smile:

Reply 1393

Nautic4l

12

Original post by MoHoosen9167

I put that, because the groups on either side are the same?

I put that too but it was just a guess lol cba after a while

Reply 1394

e1997

7

Original post by MoHoosen9167

No no, the -3 was just because I probably made more errors!

Ahhh okay haha, thought I'd left out something!!!

What did you guys get for Kp in multiple choice?? 0.5 something or 0.67?
And the no. moles of the NO2 before that?

Reply 1395

MoHoosen9167

10

Original post by neverstop

Which one increased the equilibrium yield of CN? I swear they were trying to catch us trying to make us pic KCN because that's what we learn but I actually chose KOH because of the way OH reacting with H and therefore equilibrium moves to right ? Or maybe the answer is KCN?

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I chose KCN because we add KCN to provide sufficient CN in nuc. Add reactions.

Reply 1396

Wahid1

7

Original post by neverstop

Which one increased the equilibrium yield of CN? I swear they were trying to catch us trying to make us pic KCN because that's what we learn but I actually chose KOH because of the way OH reacting with H and therefore equilibrium moves to right ? Or maybe the answer is KCN?

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Koh

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