Ocr f321 23 may 2013~official discussion thread

On my ipad and don't think I can upload from it

does anyone have the 2013 paper and mark scheme??

cant you just upload it please

Wanna join in?

cant you just upload it please

Can I join too?

I predicted aqa geography this May last week and 2 massive markers came up that I predicted,....same with maths c 1 this summer and biology unit 1 yesterday so I'm predicting we will get a big marker on graphite and a question on reactvty trends....ooh and boiling point trends iin period 2 and 3

Sure thing. Define what an isotope is and why some people decide not to add KI to their table salt.


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An isotope is an atom of the same element but different number of neutrons.

Too much of KI is poisonous.

Hope this goes better than biology f211 yesterday was not a good paper!

Correct, my turn


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define first ionisation energy.

The energy required to remove 1 electron from each atom in 1 mole of gaseous atoms to form 1 mole of gaseous 1+ ions.


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correct !

Thanks! Explain how to carry out a titration?


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