Chapter 18, Problem 18.103QP

Given the standard reduction potential for Au³⁺ in Table 18.1 and

${\text{Au}}^{+}(aq)+e^{-} \to \text{Au(}s\text{) }E°=1.69\text{ V}$

answer the following questions. (a) Why does gold not tarnish in air? (b) Will the following disproportionation occur spontaneously?

${\text{3Au}}^{+}(aq)\to {\text{Au}}^{\text{3+}}\text{(}aq\text{) }+\text{2Au(}s\text{)}$

(c) Predict the reaction between gold and fluorine gas.