On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green. (a) Predict the new compound formed which imparts a blue-green colour to solution. (b) Write a balanced chemical equation of the reaction which takes place. On the basis of the above reaction, what can you say about the nature of copper oxide?
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
- Copper (II) chloride, CuCl2
- ) CuO(s) + 2HCl (aq) → CuCl2(aq) + H2O(l)
- Copper oxide is basic in The reaction between a metal oxide and hydrochloric acid is similar to the neutralization where a salt and water is formed thus we can say copper oxide is basic in nature.