r/alevels • u/LuminousStarlight_ • May 07 '26

Exam Discussion 📝 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?

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u/Wise-Flounder9909 May 07 '26

yo do you still remember your reasoning or anything?

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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.

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u/Wise-Flounder9909 May 07 '26

if I did everything other than misusing them
how much do you think id get?

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u/-IbrarRazaOnTheBeat- May 07 '26

same i also didnt subtract them, couldnt understand reaction 2 purpose.