OCR Salters Chemistry F335 12th June 2013 Exam revision thread

Do we need to learn the nitrogen cycle?

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Reply 2

manpyy

Does anyone have the January 2013 F335 paper?

Reply 3

david2457

OP

7

Original post by super121

Do we need to learn the nitrogen cycle?

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I was told no by my teacher. It's more being able to know the oxidation state changes with nitrogen in the cycle.

Reply 4

Original post by david2457

I was told no by my teacher. It's more being able to know the oxidation state changes with nitrogen in the cycle.

Yeah that's true, but I find it very helpful to know the background processes of the reactions; because it helps me memorise it better :tongue:

I think there's a really good diagram on the CGP book, yeah page 81 :smile:

Reply 5

Original post by manpyy

Does anyone have the January 2013 F335 paper?

It won't be released until next year. So unless somebody uploads it on TSR, most likely closer to the exam date, that's the only chance we going to have a look at it :smile:

Reply 6

super121

Original post by abzy1234

Yeah that's true, but I find it very helpful to know the background processes of the reactions; because it helps me memorise it better :tongue:

I think there's a really good diagram on the CGP book, yeah page 81 :smile:

Do we have to learn all those equations on that page?

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Reply 7

Original post by super121

Do we have to learn all those equations on that page?

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I think it's a good idea to memorise them! Or you can just apply redox rules to a given situation on the nitrogen cycle; imo it's not too difficult, just practice them :smile:

Reply 8

super121

Original post by abzy1234

I think it's a good idea to memorise them! Or you can just apply redox rules to a given situation on the nitrogen cycle; imo it's not too difficult, just practice them :smile:

Thanks

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Reply 9

millie1995

What would you do for:

Draw a labelled energy level diagram to explain why:

the atomic spectrum of copper consists of a series of lines
the lines in the arsenic spectrum are at different frequencies to those in the copper spectrum.

Thanks :frown:

Nope!

Do we have to learn which acids and bases are strong/weak or would they tell us in the exam?

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Reply 12

Original post by millie1995

What would you do for:

Draw a labelled energy level diagram to explain why:

the atomic spectrum of copper consists of a series of lines
the lines in the arsenic spectrum are at different frequencies to those in the copper spectrum.

Thanks :frown:

Hmm, I'm guessing this is the synoptic element in colour by design; do you remember working on atomic emission spectroscopy in unit 1? It's basically that. Have a look back on the chemical ideas book to help you recollect.

The lines are in different frequencies because each elements has unique energy levels. So it absorbs a unique amount of energy (to excite electrons to higher/excited energy levels); and so too emits this certain unique amount of energy. Thus, the frequencies of energy absorbed and emitted by copper and arsenic will be different.

You can also add the relationship E=hv (again unit 1 and also unit 2 stuff), which proves that each energy level is unique for each element (as it absorbs different v-frequencies).

Hope that helped! :smile:

Reply 13

Original post by super121

Do we have to learn which acids and bases are strong/weak or would they tell us in the exam?

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I'm sure they will tell us if its a pretty weird looking acid/base. But from what I've seen, most of them are pretty blatant; for example sulfuric acid, ethanoic acid and sodium hydroxide :smile:

Reply 14

Pie1213

I'm a little bit touch and go with the Agriculture and Industry section. Could anbody perhaps tell me what chemical ideas to revise and any other useful info on this section? Would be very grateful! :biggrin:

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Reply 15

Pie1213

No we've still got oceans to do but apart from that we've gone through all the sections :smile:

what have you got left to do?

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Reply 16

suncake

Nope, we're halfway through Oceans, and starting Medicines by Design after Easter. Saying that, I did my first past paper today and it literally seemed like most of it was just synoptic from either AS or earlier in A2, with only 1 or 2 things we hadn't covered yet. Not sure whether that's a good or bad thing..!

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Reply 17

Willisme1