(a) Calculate the equilibrium constant for the following reaction at `25^@C`.
`Sn(s) + Pb^(2+)(aq) to Sn^(2+) (aq) + Pb(s)`
The standard emf of the corresponding voltaic cell is 0.01 V.
(b) If an excess of tin metal is added to 1.0 M `Pb^(2+)` , what is the concentration of `Pb^(2+)` at equilibrium?

Explanation

To solve the given problem, we will break it down into two parts as specified in the question.

### Part (a): Calculate the equilibrium constant (Kc)

1. **Identify the reaction and the standard EMF**:
The reaction given is:
\[
\text{Sn}(s) + \text{Pb}^{2+}(aq) \rightarrow \text{Sn}^{2+}(aq) + \text{Pb}(s)
...