Paper 2

Question 1

Explain why there is a high attraction between a C=C double bond and Br2

Answer 1

-C=C has high electron density
-Br2 becomes polarised
-delta positive attracted to C=C

Question 2

-purpose of fractional distillation

Answer 2

-separates mixtures of compounds by chain length

Question 3

Purpose of addition polymerisation

Answer 3

Molecules joined together to make long chain molecules

Question 4

Preparing 259cm3 of an aquesoys standard solution of propanedoic acid containing an accurately measured mass of the acid

Answer 4

-weight out the sample in boat
-transfer to beaker
-dissolve sample in water
-add to volumetric flask
-with washings make up to 250cm3 in volumetric flask
-shake