Question

When you heat copper powder it gets coated with black substance . what happens when h2 gas is passed over this substance?

Answer 1

Cu + O2 → Cu2O

Cu2O + H2 → Cu + H2O

Answer 2

Answer:

Explanation:

After passing h2 gas the REDUCTION PROCESS takes place

Cu2O so formed reduces back to Cu metal and the h2 has passed oxidises to water

OBSERVATION:

The shiny brown colour of copper is retrieved

Rxn —

Cu2O + H2 ———> Cu + H2O