Question

How many moles of electrons are required for the reduction of 1 mole of \( \mathrm{Cr^{3+}} \) to \( \mathrm{Cr^0} \) (s)?

• A. 1 mole of \( e^- \)
• B. 2 moles of \( e^- \)
• C. 3 moles of \( e^- \)
• D. None of these

Hint:

For reduction reactions, the number of electrons required is equal to the difference in oxidation states multiplied by the number of moles of the substance.