Chemistry

Problem

An experiment was set up to compare the following two cells under standard conditions: cell 1:

\text{Zn(s)} \mid \text{Zn}^{2+}(\text{aq}) \parallel \text{H}^+(\text{aq}), \text{Cr}_2\text{O}_7^{2-}(\text{aq}), \text{Cr}^{3+}(\text{aq}) \mid \text{Pt(s)}

cell 2:

\text{Mg(s)} \mid \text{Mg}^{2+}(\text{aq}) \parallel \text{H}^+(\text{aq}), \text{Cr}_2\text{O}_7^{2-}(\text{aq}), \text{Cr}^{3+}(\text{aq}) \mid \text{Pt(s)}

It was found that the voltage in cell 1 was +2.12 V, and in cell 2 the voltage was +3.73 V.