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Q.

What is the oxidation number of As in the compound $K {({NH}_{4})}_{2} {AsO}_{4} \cdot 6 H_{2} O$ ?

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a

+5

b

-3

c

+3

d

+1

answer is D.

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Detailed Solution

The oxidation number of given compound;

$\overset{+ 1}{K} ({\overset{+ 2}{NH}}_{4}) \overset{+ 5}{_{2} A} 2 s {\overset{- 8}{O}}_{4} \cdot 6 {\overset{0}{H}}_{2} O$

Thus, the oxidation number of As in the compound $K {({NH}_{4})}_{2} {AsO}_{4} \cdot 6 H_{2} O$ is +5.

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What is the oxidation number of As in the compound KNH42AsO4⋅6H2O?