Crude Oil

Question 1

Which two methods can be used to confirm water is formed during complete combustion?

Answer 1

1. Anhydrous copper sulphate crystals turns from white to blue
2. Cobalt chloride paper turns from blue to pink

Question 2

Addition reaction of ethene with bromine

Answer 2

ethene + bromine → diobromoethane

*no uv light required

(looses double bond as carbons bond to Br)