Question

Answer the questions below, relating your answers only to salts in the following list:

Sodium chloride, Anhydrous Calcium chloride, Copper sulphate- $5$- Water

(b) If Copper sulphate- $5$- Water is heated, the water is driven off, leaving anhydrous Copper sulphate.

(i) What is the color of anhydrous copper sulphate?

Answer 1

Definition of Anhydrous Copper sulfate

• When Copper sulfate- $5$- Water$\left({\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}\right)$ is heated then Water $\left({\mathrm{H}}_2\mathrm{O}\right)$ is driven off and produces an anhydrous Copper sulfate $\left({\mathrm{CuSO}}_4\right)$.
• The color of anhydrous Copper sulfate $\left({\mathrm{CuSO}}_4\right)$ is white.

Chemical formula of anhydrous Copper sulfate

• ${\mathrm{CuSO}}_4$.

Balanced reaction

${\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{heat}}{\to }{\mathrm{CuSO}}_4+5{\mathrm{H}}_2\mathrm{O}$

The color of Copper sulfate $\left({\mathrm{CuSO}}_4\right)$ is white.