Core practical 4 - Hydrolysis of a halogenoalkane

Question 1

What is the first step for hydrolysis of a halogenoalkane?

Answer 1

Prepare a water bath at around 50 - Hydrolysis is too slow at room temp so warming increases the rate of reaction

Question 2

What is the second step?

Answer 2

Label the 3 test tubes for each halogenoalkane prevents mix-ups

Question 3

What is the third step of this practical?

Answer 3

Add 5cm3 of ethanol to each test tube - Ethanol is a solvent allows halogenoalkane and silver nitrate to mix.

Question 4

What is the fourth step of this practical?

Answer 4

Add 5 drops of halogenoalkane to each test tubes and place in water bath same temp so fair conditions.

Then warm 5cm3 of silver nitrate solution in a separate test tube in the same water bath all reactants same temperature reaction is controlled

Question 5

What is the fifth step of this practical?

Answer 5

After 5 minutes add silver nitrate solution this reacts with halide to form a precipitate of silver nitrate.

then record time for precipitate to form and repeat

Question 6

Why do tertiary halogenoalkanes react faster than primary?

Answer 6

Tertiary halogenoalkanes form a stable carbon cation faster reaction.