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OCR A-level Chemistry A Paper 2 - 16th June 2025 [Exam Chat]

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Reply 60

randomnamelol

Original post

by hdhfb

does anyone know if we need to know how do draw the mechanism for alkene hydration to make an alcohol?

Yes

Reply 61

certainfields

Original post

by yuyrujagth

nickel? you mean phosphoric or sulfuric acid?

nah, alkene to alkane is Ni I'm pretty sure. phosphoric acid is for alkene to alcohol, right?

Reply 62

yuyrujagth

Original post

by certainfields

nah, alkene to alkane is Ni I'm pretty sure. phosphoric acid is for alkene to alcohol, right?

yes that alkene to alcohol was what the op was referring to

Reply 63

jjnbnmmm

cations are negative right gng or am i getting a U

Reply 64

sehajss

yo we need to cook in this paper its crazy how one mark in this subject can change everything😭

Reply 65

coolbeans85

Has the predictions guy posted yet?

Reply 66

sehajss

Original post

by coolbeans85

Has the predictions guy posted yet?

he posted like months ago

Reply 67

themonke

Original post

by certainfields

Don't think so...but on the off chance we do, isn't it just electrophilic addition like with HBr? But with a Ni catalyst ofc

Isn’t it an addition-elimination mechanism or something

(edited 10 months ago)

Reply 68

themonke

Original post

by jjnbnmmm

cations are negative right gng or am i getting a U

💔💔

Reply 69

sehajss

Original post

by themonke

💔💔

monke

Reply 70

themonke

Original post

by sehajss

monke

Reply 71

ovbtsal

Original post

by jjnbnmmm

cations are negative right gng or am i getting a U

The way i remeber it is cats have paws (cations) (positive) and onions make you cry (anions) (negative)

Reply 72

Dhddjdjdjdnrn

Is there any long wordy questions we need to memorise answers for this paper other than benzene and phenol reactivity and practical based questions ?

Reply 73

raantaro

Original post

by Dhddjdjdjdnrn

Is there any long wordy questions we need to memorise answers for this paper other than benzene and phenol reactivity and practical based questions ?

maybe the stuff about alkane reactivity like the increased points of contact and all that yap

Reply 74

raantaro

Original post

by LM77

I think also the questions on purification etc because they tend to be pretty fixed. Such as where you need to calculate the percentage yield and devise a method for the student to obtain a pure sample of x

for sure (these questions are beautiful im praying it comes up as a 6 marker)

Reply 75

Masrooler

Original post

by jjnbnmmm

cations are negative right gng or am i getting a U

CATions are PAWsitive gng js remember that

Reply 76

raantaro

Original post

by Masrooler

CATions are PAWsitive gng js remember that

its actually embarrassing that i still need to use this in year 13 LMAOO i will never trust myself to remember which is which otherwise

Reply 77

raantaro

Original post

by hdhfb

does anyone know if we need to know how do draw the mechanism for alkene hydration to make an alcohol?

yes u do its the exact same as something like H-Br just use H-OH and make sure u give the correct major/minor product depending on what it asks

Reply 78

Masrooler

Original post

by raantaro

its actually embarrassing that i still need to use this in year 13 LMAOO i will never trust myself to remember which is which otherwise

😂😂 facts but gng why do we even need to know what cations are they never even ask ts

Reply 79

raantaro

Original post

by Masrooler

😂😂 facts but gng why do we even need to know what cations are they never even ask ts

cation is an electrophile right they literally only ask abt electrophiles and nucleophiles

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