Balance a reaction

If it is really HPO32-, the equation can only be a half equation.

This is because the oxidation number of P increases from 3 to 5, but there is no element with decreasing oxidation number.

The answer is:

HPO32- + 3OH- → PO43- + 2H2O + 2e-

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If it is HPO42- instead of HPO32-, the reaction is simply neutralization.

The answer is:

HPO42- + OH- → PO43- + H2O
=

2008-07-10 15:19:33 補充：
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