Question

Copper (2) oxide & charcoal are black solids .How would you distinguish the two solids

Answer 1

Charcoal will burn. You may also be able to distinguish it by smell, since it’s rarely purged of all its “burnt wood” residue.

Copper oxide will dissolve in a strong acid, such as hydrochloric or sulphuric and form a blue solution. Charcoal will not.


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Answer 2

One of tge easiest method is Powdered charcoal and copper oxide can be separated by addition of water. Charcoal being less dense floats on the top and copper oxide settles at the bottom of the container


On warming with dilute acid solutions copper oxide sample(black) is converted in blue solution which can separated by filtration..