Edexcel A-Level Chem Paper 3 General + Practical Principles in Chemistry [Exam Chat]

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Original post by HiteshGulia1

well, I just hope the synthesis question involves grignard reagents as that would be more doable and it would be good if the nmr questions aren't worth more than 5 or 6 marks.

probs won't be we alr had a question on it, it'll be something disgusting

Reply 62

user927401

8

any chance of like buffer q/Kc calcs? and is it likely we will get a NMR q

(edited 10 months ago)

Reply 63

3ASTARSINSHALLAH

9

Original post by user927401

any chance of like buffer q/Kc calcs? and is it likely we will get a NMR q

There was no kp or kc in p1 and a 2marker on nmr so both will come up

Reply 64

Ugonguyen

4

icl no point predicting anything because in physics paper 3 basically very little predicted came up ( no further mechanics at all and same for some other topics near enough ) it seems stupid to me to gamble on topics coming up as edexcel clearly have no issue avoiding some topics all together just some advice ngl

Reply 65

sylkiebot

10

Guys can someone please explain this? Its in the 2017 past paper, question 5d page 19.
https://www.revisely.co.uk/documents/papers/alevel/chemistry/edexcel/76776-a-level-paper-3-qp.pdf

Reply 66

Original post by sylkiebot

Guys can someone please explain this? Its in the 2017 past paper, question 5d page 19.
https://www.revisely.co.uk/documents/papers/alevel/chemistry/edexcel/76776-a-level-paper-3-qp.pdf

because its a grignard, there is a delta negative charge on the carbon with MG-BR attached (remember thats why you can make a new C-C bond. because its partially negative). so then theres like a substitution where H swaps MG-BR because water is polar and has polar bonds so H is partially positive and attracted to the partially negative carbon. Hydrogen can only form one bond so the O-H/rest of water molecule is disregarded

Reply 67

remember CH3CH2CH3 is just propane... just drawn in a vertical orientation

Reply 68

OllieAS345

8

Original post by 3ASTARSINSHALLAH

There was no kp or kc in p1 and a 2marker on nmr so both will come up

also only 10 marks of organic chemistry in organic paper -_-

Reply 69

TypicalNerd

18

Original post by OllieAS345

also only 10 marks of organic chemistry in organic paper -_-

WHAT????? (I sat A level chemistry last year, I have no clue what your papers were like)

That probably means paper 3 will be very organic heavy.

(edited 10 months ago)

Reply 70

arls99

That can't be true, we had 11 with just the isomers 6-marker and synthesis 5-marker, then there were the mechanisms and multiple choice ones so it's way more than 10

Reply 71

moonbeige

10

do we have to know the practical methods in and out cause if so im done for 💀

Reply 72

TypicalNerd

18

Original post by moonbeige

do we have to know the practical methods in and out cause if so im done for 💀

Generally, the practicals they ask for a full method for are things like recrystallisation, making a standard solution and drying an organic liquid.

Otherwise, it’s not common they get you to recite a full method.

(edited 10 months ago)

Reply 73

anyone else think paper 3 is so much harder than first two papers? genuinely aids

Reply 74

arls99

Yeah it's horrible I'm really dreading it

Reply 75

lakshinator

2

what do we think the grade boundaries will be across all 3 papers?

Reply 76

charminggem

is anyone feeling SO UNPREPARED

Reply 77

Original post by charminggem

is anyone feeling SO UNPREPARED

mate im refreshing every 2 mins to read comments like these to feel better about myself... literally havent had time to prepare for paper 3. dont know why edexcel couldn't just throw this final paper to monday.. i'd rather lose a few days of summer holiday to actually do well on this and actually enjoy my summer holiday

Reply 78

charminggem

Original post by a_level185

mate im refreshing every 2 mins to read comments like these to feel better about myself... literally havent had time to prepare for paper 3. dont know why edexcel couldn't just throw this final paper to monday.. i'd rather lose a few days of summer holiday to actually do well on this and actually enjoy my summer holiday

LITERALLY SAME. 2 chem paper in one week is criminal especially with other subjects+ the longest paper there is? I'd rather long it out a few days and do well then know ive failed it and worry the whole summer..

Reply 79