Question

Make a solution of the unknown substance : Add Sodium Hydro-
xide solution or Ammonium Hydroxide solution, make, observations and give your deductions. Warming the mixture
May be needed. Choose from substance containing, Ca1+, Cu2+, Fe2+, Fe3-, Ph2+, Zn1-, Nh4-.​

Answer 1

Answer:

(i) A bluish white precipitate appears which dissolves in excess of NH

4

OH and give an inky blue solution of tetra-amino copper sulphate.

(ii) A gelatinous white precipitate appears which dissolves in excess of NH

4

OH and give a clear transparent colourless solution of tetraamine zinc sulphate.