Question

Give one chemical test to distinguish between the following pairs of compounds.
Zinc sulphate solution and Zinc chloride solution.

Answer 1

Zinc sulphate solution and Zinc chloride solution:

• On adding ${\mathrm{BaCl}}_2$ solution, Zinc sulphate solution gives a white precipitate of ${\mathrm{BaSO}}_4$ but Zinc chloride solution will not give any precipitate with ${\mathrm{BaCl}}_2$ solution.
• Chemical equation:

$$\begin{gathered} {\mathrm{BaCl}}_2\left(aq\right)+{\mathrm{ZnSO}}_4\left(aq\right)\to ZnC{l}_2\left(aq\right)+{\mathrm{BaSO}}_4\left(aq\right) \\ (Whiteppt) \end{gathered}$$