How can remove the black substance formed by heating the copper powder in a china dish 


Asked by Jaiswalvarsha160 | 15th Apr, 2020, 04:02: PM

Expert Answer:

Black substance is formed by reaction of Cu powder with O2,.When it forms Cupric Oxide( Cu2O), It is removed by using dil. sulphuric acid (H2SO4).

Answered by Ravi | 17th Apr, 2020, 04:33: PM