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CBSE Class 9 Answered

copper has two valencies.but while formulating the chemical formula which of the valencies can be used?
Asked by Gayathri C | 24 Nov, 2013, 07:02: PM
answered-by-expert Expert Answer

Copper has variable valency +1 and +2. Due to variable oxidation state, it is placed in transition elements. When copper is in +2 oxidation state, it is called cupric ion. For example: copper sulfate (CuSO4)

Copper in +1 oxidation state is called cuprous ion. For example: cuprous oxide (Cu2O).

Answered by Hanisha Vyas | 25 Nov, 2013, 10:54: AM
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