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Aqa chem 4/ chem 5 june 2016 thread

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Reply 920

FireBLue97

Original post by Hclarke9

Yes, i put nucleophilic addition and also got the same name as you.

2-chloro ethanoylchloride
cl------------ch2cocl the second c

Reply 921

idk97

am i the only one that got 8 for the carbon nmr ? :frown:

Reply 922

badaman

Original post by FireBLue97

2-chloro ethanoylchloride
cl------------ch2cocl the second c

Fully probably lost 30 marks

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Reply 923

Ukrainian Doctor

Original post by lukesta23

You dont need H+ Ions you puppet you arent making a hydroxy nitrile

I know 😭😭😭😭
He problem with this paper was that We had no time to go back and check answers because of the volume of 1 markers that took ages to figure out. 😭😭😭 Guess I am doing agriculture. 🌷🍁🎍🌿🌴🌳

Reply 924

dfsfdsfd

can you test for acyl chlorides with alcohol?

Reply 925

SirRaza97

Was the actetate mechanism nucleophilic addition. PLEASE ANSWER

Reply 926

FireBLue97

hydrogen bonding H2N ------ HN2CH2COOH etc.

Reply 927

AliRock

Original post by RME11

It would be 2-chloroethanoylchloride.

Don't need the 2.

Reply 928

Pandarambo

Original post by 26december

So I resat this paper (3rd year of A-Levels) and it's safe to say it's been a pointless 3 years considering I won't even get into university now :frown:

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I know the feels bro <3

Reply 929

Bailey2j09

Original post by Ebaysass

Yep White Ppt of Agcl

they both had chlorine in them and so would both show a precipitate

Reply 930

Gezza_O'Brien

Grade boundary predictions/any sign of an unofficial mark scheme yet? I know it's early doors but I'm freaking tf out lmao

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Reply 931

FireBLue97

Original post by SirRaza97

Was the actetate mechanism nucleophilic addition. PLEASE ANSWER

acetol nucleophilic addition 100% correct

Reply 932

lukesta23

Original post by Anno007

Edit: oops, misread your comment.

what are you talking about you dont need to form HCN you just need to form the nitrile which is done by KCN as the nitrile group subbed the Br there is no need for H+ Ions unless the compound was an aldehyde or ketone and you wanted a hydroxy group.

But that wasn't the question, so all that was needed was ethanol to catalyse

Reply 933

askDentistry

Original post by lishakb97

it told you in the question that it meant stitch

Well it clearly wasn't clear enough since other people didn't understand the word SUTURE. Anyways, if they needed to use the word stich to clarily then why use any other word to throw people off?

Reply 934

lahigueraxxx

Original post by lahigueraxxx

For the first two equations did you guys use an equilibrium sign?!?!?!?!?!?!!??

Anyone????

Reply 935

clarkey500

I agree it was unfair that our lack of medical knowledge in a chemistry exam will make us do worse. I spoke to someone who does biology after (who's ultra intelligent) and he said that the reason why one of the horrible things (can't remember their name) was because one of them had a fishy smell, I was just like how the **** was I supposed to know that!

I think I might need those stitches though after that excuse of an exam.

Reply 936

Examguy123

http://filestore.aqa.org.uk/subjects/AQA-CHEM4-W-QP-JUN11.PDF

the difficulty of that past paper above matches that of today's paper (in my opinion at least).

for this paper you needed:
C - 56
B - 65
A - 74
A*- 83

I think the grade boundaries will match up too

I hope anyway.....

Reply 937

lukesta23

Original post by Anno007

Edit: oops, misread your comment.

Reply 938

Hclarke9

Anyone get 1.2 for the salt/acid question??? Cant remember exactly what the question was asking but it was the last question on the 2nd page

Reply 939

Anno007

The order were 1 and 2. D increased by 1.5 and E increased by 1.5. However, E was second order, therefore we get the 3.375 times increase in rate 1.5 x 1.5^2.