State the valency of plumbite.

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Solution

Valency of lead (Pb) = 2.
Valency of oxygen (O) = 2
In plumbite ion (PbO₂^-2), there are two oxygen atoms. So the total valency of oxygen = 2 x 2 = 4
Net valency of plumbite (PbO₂^-2) = 2 - 4 = -2
The valency of plumbite (PbO₂^-2) is -2.

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