Question

What happen when copper chloride reacts with an aqueous solution of sodium hydroxide? State the color of the precipitate formed.

Answer 1

Reaction Summary:

• Copper(II) hydroxide $\left(\mathrm{Cu}{\left(\mathrm{OH}\right)}_2\right)$ and sodium chloride $\left(\mathrm{NaCl}\right)$ are formed when copper chloride $\left({\mathrm{CuCl}}_2\right)$solution reacts with an aqueous of sodium hydroxide $\left(\mathrm{NaOH}\right)$ solution.
• This reaction is considered as a double displacement reaction.

Chemical Reaction:

• The balanced chemical reaction is as follows:

${\mathrm{CuCl}}_2\left(\mathrm{aq}\right)+2\mathrm{NaOH}\left(\mathrm{aq}\right)\to 2\mathrm{NaCl}\left(\mathrm{aq}\right)+\mathrm{Cu}{\left(\mathrm{OH}\right)}_2\downarrow$

Color of the precipitate formed:

• The precipitate here is copper hydroxide whose color is blue.