“Copper(II) ions form the complex $[\text{Cu}(\text{NH}_3)_4]^{2+}$ with $\log K_f = 15.0$. The standard potential of $\text{Cu}^{2+}/\text{Cu}$ is $0.34\ \text{V}$. What is the standard potential of $[\text{Cu}(\text{NH}_3)_4]^{2+} + 2e^- \rightarrow \text{Cu} + 4\text{NH}_3$ at $298\ \text{K}$?” is available to Standard subscribers.