OCR A-level Chemistry A Paper 1 - 10th June 2025 [Exam Chat]

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Reply 80

medrbg

Hi, could someone explain how scaling up or down works with dibasic and tribasic acid/bases? I always get it the other way and end up losing marks!

Reply 81

sxmqur10

Original post by medrbg

Hi, could someone explain how scaling up or down works with dibasic and tribasic acid/bases? I always get it the other way and end up losing marks!

don’t you just times H+ by two or three? i think

Reply 82

hana2006

Original post by JJ30

Wasn’t a fan of those primrose kitten papers, the wording was a bit off for me

Do you mind sharing please🙏🏾

Reply 83

jremmy

Does anyone have any tips or acronyms for transition element colours

Reply 84

Jjjjas

Original post by 5hyl33n

Where do you find yourself losing marks?

Maths q definitely

Reply 85

Jjjjas

Original post by 5hyl33n

Cheeky.

I was hoping Jjjjas was able to tell me if they are losing marks on calculations or theory types of questions.
The former would be better as it’s an easier problem to ‘fix’ especially with the exam not too far away.

It’s also theory ahh im so sorry to be a bother but id rather ask now than be crying tears of regret on results day - hope you don’t mind me asking

Reply 86

5hyl33n

Volunteer Team

Original post by Jjjjas

Maths q definitely

Original post by Jjjjas

It’s also theory ahh im so sorry to be a bother but id rather ask now than be crying tears of regret on results day - hope you don’t mind me asking

Don't be sorry.

In terms of calculations, practice makes perfect. As you work through questions, think carefully about the order of steps and try to understand the reason behind each one.

In terms of theory, look at the specification. Can you answer each specification point? Since we are only two days away, try and focus on the most common topics.

Reply 87

Jennifer2314

Original post by jremmy

Does anyone have any tips or acronyms for transition element colours

second this transition metal is my weakest. I really hope it doesnt come in paper 1 and rather in paper 3 so i have more time to prepare

Reply 88

yuyrujagth

whats the end point for mno4- and fe2+ titration? Is it purple to colourless, purple to pale pink or pale pink to colourless?

Reply 89

OliverHuddart

Original post by yuyrujagth

whats the end point for mno4- and fe2+ titration? Is it purple to colourless, purple to pale pink or pale pink to colourless?

purple to pale pink, but the pink is so pale its basically colourless

Reply 90

sxmqur10

Original post by OliverHuddart

purple to pale pink, but the pink is so pale its basically colourless

i thought it was colourless/pale pink to purple because the purple colour signifies that no more MnO4- is reacting?

Reply 91

OliverHuddart

Original post by sxmqur10

i thought it was colourless/pale pink to purple because the purple colour signifies that no more MnO4- is reacting?

yeah that makes more practical sense

Reply 92

Maya lallzz

Guys we need to know about the plane polarised light with the optical isomers right?

Reply 93

Jennifer2314

can someone please share how thye memorised the transition metal colours please

Reply 94

sehajss

Original post by Maya lallzz

Guys we need to know about the plane polarised light with the optical isomers right?

nah thats for aqa never seen it for ocr a

Reply 95

raantaro

Original post by Jennifer2314

can someone please share how thye memorised the transition metal colours please

dont use the ocr sheet use pmt summary notes they have them in an easily understandable table

Reply 96

sehajss

Original post by Jennifer2314

can someone please share how thye memorised the transition metal colours please

use flashcards or quizlet

Reply 97

wtvrrrrrrr

Original post by Jennifer2314

can someone please share how thye memorised the transition metal colours please

i don't really like blurting but for TM its rlly good! try blurting them out now every few hours before the exam - it becomes free marks!

Reply 98

Glaurung

How is everyone feeling?

Reply 99

Lanadelslay_

Original post by jremmy

Does anyone have any tips or acronyms for transition element colours

i just made flashcards and get someone to test you (or you can do it yourself) over and over again (literally) until you get ALL of them right. I think there are so many to learn it makes it hard to do an acronym

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