WJEC A-Level Chemistry A2 Unit 4 (18/06/2024)

Original post by staycyoungluv

how was it? i found it quite good ngl so i'll enjoy being free from a-levels^^
but what was the reactions for the hydroxybenzene added with ethanoyl chloride? i forgot that one so i randomly drew an ester for that, and i didn't know how to convert NH2 to the diol

this is the hydroxy one. And phenylamine to phenol was WARM HNO2

Reply 4

Original post by shd14235

How’s everyone feeling?

absolutely beautiful exam. Every single question was sent from god as to shine down upon me.

Reply 5

Am I the only one that didn’t rly like it 😭

Reply 6

byvvgvhjo8

4

Original post by romanfurey

this is the hydroxy one. And phenylamine to phenol was WARM HNO2

What if you said NaNo2 and HCL . These are made insitu to prepare HNO2

Reply 7

alawj

It was kinda ugly, but better than some other past papers. I really don’t like chemistry

Reply 8

chloe332

5

Original post by byvvgvhjo8

What if you said NaNo2 and HCL . These are made insitu to prepare HNO2

Yeah that’s what I said, you can either say just hno2 or nano2 and hcl because it said reagent(s). Did it say to give the conditions because I didn’t?

Reply 9

Original post by chloe332

Yeah that’s what I said, you can either say just hno2 or nano2 and hcl because it said reagent(s). Did it say to give the conditions because I didn’t?

you can say this yes.

Reply 10

Anyone remember what they got for that question asking for the mass when they gave the % yield? I got 3.96g

Reply 11

Original post by el456

Anyone remember what they got for that question asking for the mass when they gave the % yield? I got 3.96g

correct

Reply 12

Original post by shd14235

How’s everyone feeling?

what did everyone get for the position of the spot on the Rf value. And what did u guys get for the last question. I thought tthe last question was beautiful

Reply 13

Original post by romanfurey

this is the hydroxy one. And phenylamine to phenol was WARM HNO2

For the one where it showed a benzene compound with arrows in the centre labeled like J and stuff, what was it when it reacted with ethanoyl chloride? Did it react with both OH groups or just one? Also how what did you say about the carbon molecule that was like a ring of carbon and oxygen and methyl’s? I could tell if it was one or two carbon environments

Reply 14

staycyoungluv

10

Original post by romanfurey

what did everyone get for the position of the spot on the Rf value. And what did u guys get for the last question. I thought tthe last question was beautiful

for the Rf value i got 4.32 so i drew the point on 5.32cm, but i'm so unsure about the last question bc i got (+) 44% and (-)56% but everyone else got sixty something or 75% for the negative enantiomer😭

Reply 15

for the high res proton nmr table, did anyone say both were singlet and the area 3 for the first one and 9 for the 2nd??

Reply 16

Original post by Bobabbg

For the one where it showed a benzene compound with arrows in the centre labeled like J and stuff, what was it when it reacted with ethanoyl chloride? Did it react with both OH groups or just one? Also how what did you say about the carbon molecule that was like a ring of carbon and oxygen and methyl’s? I could tell if it was one or two carbon environments

I think I said 2 environments because all the methyl carbon atoms were in one environment, and then all the other carbon atoms bonded to oxygen atoms were in another environment? idk if that's right

Reply 17

Original post by el456

I think I said 2 environments because all the methyl carbon atoms were in one environment, and then all the other carbon atoms bonded to oxygen atoms were in another environment? idk if that's right

I said that too and I wanted to mention something about them being symmetrical but I didn’t know how to say it 😭

Reply 18

Original post by Bobabbg

I said that too and I wanted to mention something about them being symmetrical but I didn’t know how to say it 😭

I never know how to answer questions on carbon nmr, because for the second carbon nmr question about the comparison I was giving examples of the bonds and at what chemical shift they would occur lol

Reply 19