AQA Chem Unit 1 May 22nd 2015 *OFFICIAL THREAD*

Yeah totally, there's waayyy more content to learn for A2, especially chem 5, it's more about testing your knowledge I guess and applying it.
True, even the physics paper this year had some right weird questions on so fingers crossed it won't be as bad tomorrow.
Oh nice, we're both in the same position then. Good luck, I hope you do get a higher grade this time round, work hard!


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Combustion products in complete combustion is CO2 and H2O. CO2 is a greenhouse gas.

Incomplete combustion - Carbon particulates (C) e.g. soot exacerbates asthma
Carbon monoxide (CO) is a toxic gas
Im not sure about the last part I've never heard of it

I think a question on diamond might come up something along the lines of its bonding and melting points I've seen graphine questions but no diamond I know someone else said that on this thread before so there's a good chance of it

I'd love for this to take off, i need help in AQA Chem

For the following question or anything similar. When calculating the amount of moles of Pb why is it

8.14g / 207.2

NOT 8.14g / (3x207.2) ?

I think that too. Diamond was only on the old spec papers so it could come up tomorrow

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Any predictions of what might come up tomorrow?

Can someone please tell me all the definitions that we need to know for chem1, thank

moles=mass/Mr
therefore 8.14/207.2 as the Mr of Pb(NO3)2 is 207.2 not 3x207.2

moles=mass/Mr
therefore 8.14/207.2 as the Mr of Pb(NO3)2 is 207.2 not 3x207.2

What's the answer to this question?

Ionisation energies barely came up last year, mass spec too. I think there's gone be big markers on either one like 5/6 marks.

What's the answer to this question?

well to find one mole of the reactant you use the equation moles=mass/Mr so its 8.14/207.2 = 0.0393 moles of Pb

52.4 cm^3 is what i got but i didn't have a proper calculator so might have made and error using the computer one. Can send you my working out if you want