Question

When Sodium hydroxide is added to Copper sulphate a pale blue precipitate of Copper hydroxide is obtained. This precipitate can be separated from the mixture by the process of ____________.

Answer 1

Answer:

When Sodium hydroxide is added to Copper sulphate a pale blue precipitate of Copper hydroxide is obtained.

It is because of the double displacement reaction.

Following is the chemical equation:

$$\begin{gathered} 2\mathrm{NaOH}\left(\mathrm{aq}\right)+{\mathrm{CuSO}}_4\left(\mathrm{aq}\right)\to {\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+\mathrm{Cu}{\left(\mathrm{OH}\right)}_2\left(\mathrm{s}\right) \\ (\mathrm{Sodium}(\mathrm{Copper}(\mathrm{Sodium}(\mathrm{Copper} \\ \mathrm{hydroxide})\mathrm{sulphate})\mathrm{sulphate})\mathrm{hydroxide}) \\ \left\{\mathrm{precipitated}\right\} \end{gathered}$$

Now we have to separate the precipitate of Copper hydroxide from the solution of Sodium sulphate.

• The separation of precipitated Copper hydroxide from the mixture of Sodium sulphate.Filtration:
• The precipitate formed by copper hydroxide can be filtered and get separated from the solution.
• While the soluble sodium sulphate will present in the solution in the soluble form.

Conclusion:
Therefore, This precipitate can be separated from the mixture by the process of filtration.