Question

A student took a small amount of copper oxide in a conical flask and added dilute hydrochloric acid to it with constant stirring. He observed a change in colour of the solution. 

1. Write the name of the compound formed and its colour.
2. Write a balanced chemical equation for the reaction involved.

Answer 1

1. The substance is known as copper (II) chloride (CuCl₂), and it has a bluish hue.
2. \[\ce{CuO(s) + 2HCl (aq) ->CuCl2 (aq) + H2O(l)}\]