When the following redox equation is balanced with smallest whole number coefficients,the coefficient for zinc will be _____.
Zn(s) + ReO₄^-(aq) $\to$ Re(s) + Zn²⁺(aq) (acidic solution)

Question

When the following redox equation is balanced with smallest whole number coefficients,the coefficient for zinc will be _____. Zn(s)+ ReO₄^-(aq) $\to$ Re(s)+ Zn²⁺(aq)(acidic solution)

Quizplus · Accepted Answer

The oxidation state of Zn changes from 0 to +2, and the oxidation state of Re changes from +7 to 0. To balance the equation, we need to make sure that the number of electrons lost by Zn is the same as the number of electrons gained by Re. Therefore, we need to multiply the first half-reaction (Zn) by 7 and the second half-reaction (Re) by 2. This gives us:

7Zn(s) + 2ReO4-(aq) + 14H+(aq) → 2Re(s) + 7Zn2+(aq) + 12H2O(l) + H2SO4(aq)

The coefficient for zinc is 7.

When the Following Redox Equation Is Balanced with Smallest Whole →\to→

When the Following Redox Equation Is Balanced with Smallest Whole $\to$