OCR SALTERS CHEMISTRY AS 10th JUNE

help does anyone have a checklist on topic 3 the polymer revolution that they could post up?
i dont know what ive got to learn!

Reply 1

Ramaya

http://www.wpbschoolhouse.btinternet.co.uk/page18/05PRws.htm
i am doing this at the moment too :frown:

Reply 2

LS.

I'm revising for it too :frown:

- The past papers for Minerals to medicine are so unhelpful because they have that extra chapter in - I think I'm gonna give up doing past papers and just go through my notes again.

Typed up the revision guide we were given in class. Hope you find it useful.

Revision Guide – PR

Alkenes

1. Structure

-All forms of representation – e.g. skeletal formula
-Presence of double bond
-Bond length of double bond (c=c) compared with single (c-c)
-Bond angles in alkenes, alkanes
-No rotation about double bond; rotation about single bond
-Isomers, including geometrical isomers (cis- and trans-), no cis-, trans-, isomers in alkanes
-Alkenes with dipoles e.g.

(diagram)

But

(diagram)

Has no dipole.

-Effect of dipole on properties

2. Reactions

-Addition with Br2 and HBr
-Products formed and
-Mechanism of reaction and
-Name for such reaction e.g. electrophillic addition
-Name of intermediate formed
-Conditions for reactions (lab and industry)
-Changes you would observe
-Polymerisation include representation of monomers and polymers
A – A polymer
A – B polymer (also called a co polymer)
-Mechanism of polymerisation including initiation, propagation and termination
-Accidental; discovery of polymers
-Special catalysts used in polymerisation, to include Ziegler and Natta catalysts

3. Polymers

-Properties as a result of chain length
-Side groups
-Stereoregularity
-Crystalline and non crystalline
-Intermolecular forces to include presence of permanent dipole, hydrogen bonding
-Cross links
-Hydrogen bonding in detail

Reply 3

Chocolate_Lover

ok thanx
im shitting myself, i dont think ill take it next year, got 1 mark of a C in jan, im repeating, reckon i will get a u for unit 1 this time though as i have not revised it. i got a in coursework so hopefully 2moro ig i get a d/e i will still get a c/d
do u think?

Reply 4

Dust

isnt salters the heardest chem exam board?

Reply 5

spikeyguru

its meant 2 b the hardest but i havnt checked out the others. unit 1 is ok i need 2 revise unit 2 tho...has anyone got the jan 04 uint 1 and unit 2 papers?

Reply 6

Da-Dapper

any1 got the mark schemes for any of the papers?

Reply 7

Chocolate_Lover

spikeyguru

its meant 2 b the hardest but i havnt checked out the others. unit 1 is ok i need 2 revise unit 2 tho...has anyone got the jan 04 uint 1 and unit 2 papers?