Question

Give Reasons:1Copper sulphate crystals turn to a white amorphous powder on heating.​

Answer 1

Answer:

The crystals of hydrated copper sulphate salt are blue in colour. When heated, the salt loses its water of crystallization and turns white.

Answer 2

• As we know that when hydrated copper sulfate is heated, it changes its color from blue to white powder.

                      $CuSo4.5H2O$            ⇄     $CuSo4$                            $+ 5H2O$

        Hydrated Copper Sulfate     ⇄      Anhydrous Copper Sulfate + water

             ( Blue Crystal )                              ( White Powder )

• When hydrated copper sulfate is heated it forms anhydrous copper sulfate with a water molecule.

• On heating, the blue crystal of copper sulfate turns into a white powder. because the salt loses its water of crystallization and forms a white powder.

• As we know the color is changed because water is evaporated from hydrate and copper ions are left with only sulfate ions.