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Determining Oxidation Numbers
-Determine the oxidation number of arsenic in the anion, HAsO₄² ^- .

Name: ‪ Determining Oxidation Numbers -Determine the oxidation number of arsenic in the anion, HAsO 4 2 - .
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Question

‪ Determining Oxidation Numbers -Determine the oxidation number of arsenic in the anion, HAsO₄² ^- .

Quizplus · Accepted Answer

The oxidation number of hydrogen is +1, and oxygen is -2. In HAsO4^2-, the sum of oxidation numbers is -2. Let x be the oxidation number of arsenic: 1 + x + 4(-2) = -2. Solving gives x = +5.