Crude 4-nitroacetanilide to a 250ml round bottom flask and add wate. Swirl the flask until the mixture becomes slurry.
Add 15ml of concentrated HCl and 2 boiling chips.
Q1. What is the function of the HCl?
Reflux the mixture until all the solid material has gone into solution.
Cool the flask and pour the solution of 4-nitroaniline hydrochloride with stirring into a 400ml beaker containing about 100g of crushed ice.
Liberate the free 4-nitroaniline by slowly adding concentrated ammonia solution with stirring until the mixture is basic.
Q2. Why is it necessary to add ammonia solution to precipitate the product? Write the appropriate equation.
Add 15ml of concentrated HCl and 2 boiling chips.
Q1. What is the function of the HCl?
Reflux the mixture until all the solid material has gone into solution.
Cool the flask and pour the solution of 4-nitroaniline hydrochloride with stirring into a 400ml beaker containing about 100g of crushed ice.
Liberate the free 4-nitroaniline by slowly adding concentrated ammonia solution with stirring until the mixture is basic.
Q2. Why is it necessary to add ammonia solution to precipitate the product? Write the appropriate equation.