An amount of 0.2 mole of AO3− gains 1.2 mole of electron in a process. Assuming that there is no cha

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An amount of 0.2 mole of AO3− gains 1.2 mole of electron in a process. Assuming that there is no change in oxidation state of oxygen, determine the oxidation state of ‘A’ in product.

Accepted Answer

1 mole of AO3− should gain 6 moles of electron.$AO_{3}^{-} + 6H^{+} + 6e^{-} \rightarrow A^{x +} + 3H_{2}O$From charge conservation, (–1) + (+6) + (−6) = +x ⇒ x = −1.

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