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tangare [24]
3 years ago
11

What's the valency of lead in pbO2​

Chemistry
1 answer:
Andru [333]3 years ago
8 0

The valence of lead is 4.

Hence the name of the compound is called Lead (IV) oxide.

<h3>Further explanation</h3>

Given

PbO₂ compound

Required

The valence of Pb

Solution

The oxidation number of element O in the compound = -2, except for OF₂ the oxidation state = + 2 and the peroxides (Na₂O₂, BaO₂) the oxidation state = -1 and superoxide, for example KO₂ = -1/2.

The oxidation state in the uncharged compound = 0,

So The oxidation state of Pb :

Pb + 2.(-2) = 0

Pb - 4 = 0

Pb = +4

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Answer:

Percentage abundance of 121 Sb is = 57.2 %

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For second isotope, 123 Sb:

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121.7601=\frac{x}{100}\times 120.9038+\frac{100-x}{100}\times 122.9042

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<u>percentage abundance of 123 Sb is = 100 - 57.2 %  = 42.8 %</u>

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