When ammonia is added to green aqueous solution of nickel (II) sulphate, the colour of the solution changes to the violet. This is caused by

Question

When ammonia is added to green aqueous solution of nickel (II) sulphate, the colour of the solution changes to the violet. This is caused by (A) nickel ion undergoing a change in oxidation state (B) ammonia molecules replacing water molecules surrounding nickel (C) change in co-ordination number of nickel (D) change in pH value of the solution

Tardigrade Admin · Accepted Answer

The colour change is due to replacement of water molecules surrounding Ni by the ammonia molecules

Q. When ammonia is added to green aqueous solution of nickel (II) sulphate, the colour of the solution changes to the violet. This is caused by

nickel ion undergoing a change in oxidation state

ammonia molecules replacing water molecules surrounding nickel

change in co-ordination number of nickel

change in pH value of the solution

The colour change is due to replacement of water molecules surrounding Ni by the ammonia molecules