10.2.2 - Alkene Reactions

Question 1

Hydrogenation of alkenes - conditions

Answer 1

Reactants: hydrogen (gas)

Conditions: nickel catalyst (Ni), high temp. (150 C), high pressure

Question 2

Hydration of alkenes - conditions

Answer 2

Reactants: steam

Conditions: sulfuric (H2SO4) or phosphoric (H3PO4) catalyst

Question 3

Hydrogenation of alkenes

Answer 3

Alkene + hydrogen -> alkane

Question 4

Hydration of alkenes

Answer 4

Alkene + steam -> alcohol

Question 5

Halogenation of alkenes

Answer 5

Alkene + halogen -> dihalogenoalkane

alkane with 2 hydrogens replaced w/ halogens

Question 6

Halogenation of alkenes - visible effects

Answer 6

Decolourisation of reacting halogen

e.g. bromine: brown -> colourless

Indicates unsaturation (C=C double bond present)

Question 7

Alkenes and halogen halides

Answer 7

Alkene + halogen halide -> halogenoalkane

Question 8

Addition polymerisation

Answer 8

Alkene -> poly(alkene)

C=C double bond breaks to add on new monomer every side