B (Salters) F331 (Chemistry for Life) 22nd May 2015 [Official Thread]

1) Would I get a mark for writing the whole electronic configuration down? I wrote 4p2 in the end
2) You know the equation of formation for water, would I get a mark if I balanced it like this:

2H2O ----> 2H2 + O2

Instead of H2O ----> H2 + 1/2O2

Yeah 4p2 is what they wanted. And that equation is fine



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1) Would I get a mark for writing the whole electronic configuration down? I wrote 4p2 in the end
2) You know the equation of formation for water, would I get a mark if I balanced it like this:

2H2O ----> 2H2 + O2



Instead of H2O ----> H2 + 1/2O2

No that equation is not fine. Formation is 1 mole of a substance.

No that equation is not fine. Formation is 1 mole of a substance.

That's only used in isomerisation to separate branches from unbranced


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They might allow it. They asked for the 'main' energy levels (shells).

I put 2,8,18,4

Does aliphatic just mean 'does not contain an arene ring'?

Does aliphatic just mean 'does not contain an arene ring'?

I put 2, 8, 8, 8, 6

I put 2, 8, 8, 8, 6

What is purpose of catalyst. Is it to speed up rate of reaction and lower cost by lower temps. OR something else

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Everyone got butan-2-ol for the skeletal right? And C4H9?

Everyone got butan-2-ol for the skeletal right? And C4H9?

Benzene ring yeah, idk about arene ring

Everyone got butan-2-ol for the skeletal right? And C4H9?