Question

A piece of metallic sodium is added to liquid ammonia. 

1. What is the observation? 

2. What is the reason for this? 

3. What happens when the solution is kept for some time? 

4. What happens if the solution is concentrated?

Answer 1

1. The solution turns into blue. 

2. The blue colour of the solution is due to the presence of solvated electrons. 

3. On standing, the solution slowly liberates hydrogen resulting in the formation of amide. 

4. When the concentration of the solution increases the colour turns bronze and the solution becomes diamagnetic.