OCR B Salters - F335 Exam - 15 June 2011

yeah i thought it would be something like that. So if this question is asked in the exam when you circle the group should we also explain at the bottom why we have circled this particular thing, becuase im thinking of circling just the Ndouble bond N and two arene rings

Hey, I was looking at a question about the proton nmr of glycerol. Am I right in saying there are 5 proton environments?

Thanks

Just came across something on the spec I have NO idea about

Its the uses of ionic liquids. Can someone please explain it to me please. Its come up in an exam before but you just had to define what an ionic liquid is.

thanks

I think it means the friedal crafts reactions taking place on ionic liquids as combination solvent catalyst systems. This reduces flamability, solvent emissions allows reactions to take place at lower temperatures and allows any waste materials to be recycled easily. It mentions it in the salters revision guide if you have it.

Do we have to know the born haber cycle or can we use the other simpler enthalpy diagram?

Also Kp and Ksp are no longer in the specification right?

I thought glycerol has 4 environments. There are 2 CH2 groups, one at the top of the molecule and one at the bottom. This is one environment. Both of these groups are attached to an OH group which is another environment. Then the CH group in the middle of the molecule is a third environment and the OH attached to it a fourth. Not completely sure though just how I would do it. Can anyone confirm please.

oh right thanks.
What page of the revision guide is it on?

Page 59

1 and 1/2 days to cover F335. It's squeaky bum time now.

what exactly is squeaky bum time

Do we have to know the born haber cycle or can we use the other simpler enthalpy diagram?

Also Kp and Ksp are no longer in the specification right?

Do we have to know about atomic emission spectrums? The questions in the legacy papers include it when talking about paints. Because didn't we do that in the very first AS unit? and I definately made a mental note to never talk about electrons falling when it's those "why is a coloured and b colourless questions" because it cons most of the marks.

Phrase for "it's a tense time" haha