Question
\(Cr_2O_7^{2-} + 14H^+ + 6e^- \rightarrow 2Cr^{3+} + 7H_2O; \, E^\circ = 1.33 \, V At [Cr_2O_7^{2-}] \) = \(4.5 millimole, [Cr^{3+}] = 15 millimole, E is 1.067 \, V\). The pH of the solution is nearly equal to:
\(Cr_2O_7^{2-} + 14H^+ + 6e^- \rightarrow 2Cr^{3+} + 7H_2O; \, E^\circ = 1.33 \, V At [Cr_2O_7^{2-}] \) = \(4.5 millimole, [Cr^{3+}] = 15 millimole, E is 1.067 \, V\). The pH of the solution is nearly equal to: