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An oxide of metal have 20% oxygen, the equivalent weight of metal oxide is

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Detailed Solution

20% Oxygen implies 20 g Oxygen combined with 80 g of metal.

Chemical substances combine in terms of equal equivalents.

No of equivalents of Oxygen= $\frac{M a s s o f O x y g e n 20 g}{M a s s o f o n e e q u i v a l e n t o f O x y g e n 8 g} = 2.5 e q u i v a l e n t s$

2.5 equivalents of Oxygen will combine with 2.5 equivalents of the metal that weigh 80g.

Equivalent weight of metal= $\frac{M a s s o f M e t a l 80 g}{N o . o f g e q u i v a l e n t s 2.5} = 32$

Mass of one equivalent of Metal Oxide= one equivalent of metal 32 + one equivalent of Oxygen 8 = 40

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