cuppataetae
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#1
Report Thread starter 6 months ago
#1
Hi! I have an end of year exam next week in chemistry on the topics we have covered this year, however I really don't understand the amounts or electrolysis topics. Can anybody help explain to me about Moles, how to work out amounts/masses of substances, percentage yields and general things around electrolysis? (AQA examboard)

Many thanks, cuppa <3
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scimus63
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#2
Report 6 months ago
#2
try this website, it covers the stuff you are looking for and has some practice questions with answers, just go to the index page and search for what you want

https://www.science-revision.co.uk/
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Olivia edward
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#3
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#3
https://www.toplevels.co.uk/gcse-aqa-chemistry/Find exam type question for each topic
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gin_n_tonic
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#4
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#4
Mole equation is like a triangle:

Mass
Mol | Ar/Mr

Mr = relative formula mass
Ar = relative atomic mass

If you have any questions at all or examples you want me to go through I'd be more than happy to!
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cuppataetae
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#5
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#5
Thanks so much!
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libbythompson
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#6
Report 6 months ago
#6
With moles the best way to revise is just practice calculation questions, don't worry if you don't get them right at first just go through the markscheme and try to work it out and if you cant ask your teachers to explain it, good luck!!
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