Reactivity 3.4

Question 1

What happens when Alkenes react with Bromine water?

Answer 1

Bromine water changes from brown to clear.

Question 2

Define heterolytic fission, specific to nucleophilic substitution

Answer 2

Formation of a carbocation and a negative ion, due to carbon losing its shared electron.

Question 3

Define nucleophile

Answer 3

Reactants with a non-bonding electron pair that is attracted to a positive carbon cation

Question 4

Define SN2 reactions

Answer 4

SN2 reactions involve heterolytic fission and
nucleophilic substitution with mainly primary
halogenoalkanes.

Question 5

Define SN1 reactions

Answer 5

SN1 reactions involve heterolytic fission and nucleophilic substitution with mainly tertiary halogenoalkanes.

Question 6

Does rate increase or decrease down halogen group for SN1

Answer 6

Increase

Question 7

Does the number of alkyl groups affect the reaction rate for SN2 reactions

Answer 7

Yes, the less alkyl groups there are, the higher the rate of reaction due to steric hindrance.

Question 8

Does the number of alkyl groups affect the reaction rate for SN1 reactions

Answer 8

Yes, the more alkyl groups there are, the higher the rate of reaction due to steric hindrance.

Question 9

What is a lewis acid

Answer 9

A substance that accepts an electron pair

Question 10

What is a lewis base

Answer 10

A substance that accepts an electron pair