Question

As CuO is exposed to reducing atmosphere at elevated temperatures, some of Cu+2 cations will change their valency and become Cu+1 . Then, please (i) express the crystalline defect you would expect to form maintaining electroneutrality (10 points) (ii) state the type, valency and the number of the ions that are required to create each corresponding defect (10 points) Hint : O -2 anion is considered to be conserving its valency.

Answer 1