OCR (Salters) AS Chemistry: Unit F332 (Post exam discussion Jan 2010)

houseo2

i think id worked out moles 800/1000 x the concn which i think was 0.002 or something and then x mr of Na

I got like 3.6 something grams. :s-smilie:

Reply 81

OP

not sure you rmeber any others we can discuss?

Reply 82

FoOtYdUdE

9

Oh ya dooooofs. Is this the salters thread? :o:

I'm ocr chem f322, not f332. This thread was confuzzling me

Reply 83

houseo2

not sure you rmeber any others we can discuss?

Ermmm, what was the catalyst of something..I can't remember, but I put platinum. :confused:

Reply 84

humphreysjunior13

what a bitch of an exam :-) lol

Reply 85

I Have No Imagination

But isn't Nucleophilic Substitution when the nucleophile has a lone pair of electrons? HBr doesn't have a lone pair of electrons? I'm so confused. :s-smilie:

No but it has a negative charge due to being paired with a Hydrogen and being an electronegative element. The delta negative charge attacks the positivity of the carbon atom causing substitution to occur.. I think :eek:

I didn't really like this paper much :o:

Reply 86

I Have No Imagination

Ermmm, what was the catalyst of something..I can't remember, but I put platinum. :confused:

Me too

I hope this thread is allowed. I think it is because salters isn't an international exam board :confused:

Reply 87

humphreysjunior13

what a bitch of an exam :-) lol

Agreed.

Reply 88

OP

was the reaction on the second page prpagation of termination?

Reply 89

Emmalouise1990

7

I Have No Imagination

Ermmm, what was the catalyst of something..I can't remember, but I put platinum. :confused:

I put phosphoric acid :s-smilie:

Reply 90

Louuu_xx

No but it has a negative charge due to being paired with a Hydrogen and being an electronegative element. The delta negative charge attacks the positivity of the carbon atom causing substitution to occur.. I think :eek:

I didn't really like this paper much :o:

Oh boo

I'm not liking this paper very much now.
I've failed. :bawling:

What did you put for the grams of sodium?

Reply 91

Emmalouise1990

I put phosphoric acid :s-smilie:

Yeah I think that's right aswell.

Reply 92

houseo2

was the reaction on the second page prpagation of termination?

I put initiation which is wrong. But I think it may have been propagation, not sure though.

Reply 93

Reaction conditions for alcohol to alkene... agggghh. What are they? My revision guide told me concentrated sulfuric acid and reflux :s-smilie:

Reply 94

OP

ye thats what i said

Reply 95

OP

anyone know whether the reaction was propgation or not?

Reply 96

I Have No Imagination

Oh boo

I'm not liking this paper very much now.
I've failed. :bawling:

What did you put for the grams of sodium?

I'm not sure. I can't remember most of the questions. My brain has blocked it all out :erm:

It seems quite a few people struggled as well. :frown:

I think I was ok up to the article. Then I failed :cry:

Reply 97

Louuu_xx

Reaction conditions for alcohol to alkene... agggghh. What are they? My revision guide told me concentrated sulfuric acid and reflux :s-smilie:

I put water and a catalyst of hot temperature and pressure. I think refluxing with concentrated sulphuric acid is also right. I remember it can be either one.

Reply 98

OP

what properties were the pipes, and also what did you say the uses were for that high tensile film thing.

Reply 99