On heating copper powder in air …

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On heating copper powder in air the surface of copper powder becomes coated with black. Name the compound. How can this black coating be converted into brown substance. What is this? Write chemical equation in both cases

Posted by Channakeshava V 5 years, 2 months ago

CBSE > Class 10 > Science

3 answers

Maniya Jain 5 years, 2 months ago

Copper sulphate CuSO⁴ It can be prevented by dissolving any metal which is more reactive than copper like Potassium, Sodium. K +CuSO⁴-->KSO⁴ +Cu. Or Na+CuSO⁴-->NaSO⁴+Cu.

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Bishwajeet Kumar 5 years, 2 months ago

Copper sulphate CuSO⁴ It can be prevented by dissolving any metal which is more reactive than copper like Potassium, Sodium. K +CuSO⁴-->KSO⁴ +Cu. Or Na+CuSO⁴-->NaSO⁴+Cu.

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Pari Aggarwal 5 years, 2 months ago

When we heat copper in air tgen copper will react with oxygen and thus form copper oxide Cu+O2= CuO To reverse this reaction react copper oxide with hydrogen so that the brown colour of copper will return back CuO + H2 = Cu+ H2O

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Posted by Pandey Ji 5 months, 3 weeks ago

CBSE > Class 10 > Science