The oxidation number of As in H₂AsO₃^- is ________.

Question

Quizplus · Accepted Answer

To determine the oxidation number of As, we need to assign oxidation numbers to all the other elements. Since hydrogen is usually +1 and oxygen is usually -2, we can assign the following oxidation numbers: H(+1), S(-2), As(x), O(-2), S(-2), and P(-3). The overall charge of the molecule is 0, so the sum of the oxidation numbers must be 0 as well.

Hence, 1(+1) + 2(-2) + x + 1(-2) + 2(-2) + 1(-3) = 0
Simplifying this equation, we get x = +3, which is the oxidation number of As. Therefore, the answer is (C) +3.

The Oxidation Number of as in H2AsO3- Is ________

The Oxidation Number of as in H₂AsO₃^- Is ________