IAL Chemistry Unit 2 (2 June 2015)

hey what was the mass of KOH at the end?

hey what was the mass of KOH at the end?

I wrote 131g had reacted


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What do you expect the grade boundary to be?

That was a horrible paper

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Pretty average tbh, maybe 64-66 for an A? I don't know I haven't talked to many other people about how they did.

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that was such a bad paper. What were all your multiple choice answers? :P especially the barium hydroxide one

barium hydroxide vs barium sulfate? I put same color. It couldn't be pH because one is basic and the other is acidic. It couldn't be solubility in water since barium sulfate is insoluble. It couldn't be reaction with HCl because they had different products.

Correct me if I'm wrong though

What did you guys say the role of nitrogen monoxide was in the depletion of the ozone layer? And what should be done industrially to reduce the carbon footprint?

i wrote it acts as a catalyst. I don't know if it's correct :/

oh god that mass is diff for everyone 😠 ok let us make it straight!
what was the moles of h2so4? 2.44*10^-4?
then the moles of KOH in R? multiply the moles of acid into 2?
then the conc of KOH in R? 0.018? if am not wrong
then they asked the difference, the initial was 0.08987 and minus 0.018 gave us 0.07 something?
then the mass used up, i got 182g.
wbu guys?? 😔

What did you guys say the role of nitrogen monoxide was in the depletion of the ozone layer? And what should be done industrially to reduce the carbon footprint?