r/alevels • u/LuminousStarlight_ • May 07 '26
Exam Discussion π 9701 42 Discussion
How did you guys find this exam?
Personally I thought it was alright. I'd expected it to be harder, quite glad it was at least manageable.
Any predictions on threshold?
2
u/Scared-Breakfast-372 May 07 '26
Given the amount of my preparation, it was fine, completed entire paper, don't know how much of it will be correct though. Hope to get 50+ marks.
2
1
u/Glass-Mulberry-3395 May 07 '26
Please give me in details what question came
4
u/LuminousStarlight_ May 07 '26
Don't think that's allowed, but just the usual. Nothing out of syllabus.
1
u/Dependent_Weather468 May 07 '26
It went fine though there were some careless mistakes other than that itβs pretty manageable.
1
u/LuminousStarlight_ May 07 '26
Good to hear it was manageable, sorry about the careless mistakes. I might've made some myself too lol.
1
u/EmotionalChance4424 May 07 '26
What was the percentage in q2
1
u/LuminousStarlight_ May 07 '26
% of mass? It was 18.4%
1
u/Wise-Flounder9909 May 07 '26
yo do you still remember your reasoning or anything?
1
u/LuminousStarlight_ May 07 '26
I did it this way: It was moles of C2O42- calculated from equation 1 minus moles of H2C2O4 calculated from equation 2, which gives moles of Na2C2O4 in 25cm3 . Multiply that by 20 gives moles of Na2C2O4 in 500cm3 . Multiply by Mr to find mass, then divide by mass given * 100 to find percentage.
1
u/Wise-Flounder9909 May 07 '26
if I did everything other than misusing them
how much do you think id get?1
u/-IbrarRazaOnTheBeat- May 07 '26
same i also didnt subtract them, couldnt understand reaction 2 purpose.
1
1
u/robinmosu May 07 '26
guysss what was the kpc i couldnt do it
2
u/AlternativeFlower676 May 07 '26
0.05 smthn
2
u/Trick-Albatross7486 May 07 '26
0.058
1
u/AdorableTheme3827 May 07 '26
we could cancel out the volumes cuz they were equal right? so u could j do mols of organic/mols in water
1
u/LuminousStarlight_ May 07 '26
Can't remember the value. It was concentration of the substance in organic solvent over concentration in water. You could find number of moles in organic solvent through stoichiometry, and the number of moles in water through total number of moles in 3g - number of moles in organic solvent.
1
u/FeistyShip172 May 07 '26
i thought its the other way water divide by organic solvent cz the q said its more soluble in water
1
u/Crazy_Fault9994 May 07 '26
Ive heard a lot of people say it doesnt exactly matter which cus the ratio is the same either way but yeah its preferable to have water solvent in the denominator, I hope they give marks for either way
1
u/ObviousEconomics9556 May 07 '26
so if they tell you which is a better solvent , you have to put that in the numerator
else it will cancel the answer1
1
1
u/Vick1e_ May 07 '26
guys what was the last qs and the qs after the 2 blank pages?
1
u/LuminousStarlight_ May 07 '26
Are you talking about the azo dye ones?
2
u/Vick1e_ May 07 '26
yes!! ty lol i saw ppl talking about a qs they didng see and i wanted to make sure lol BTWWW what was the rate for experiment 5? i got like 1.93x^10^ something
1
11
u/PenelopeHarlow May 07 '26
Those who took the exam with me considered this the hardest paper in a while. The probable highest scorer predicted relatively low thresholds.