During the disinfection of domestic water supplies, chlorine is introduced into the water to produce HClO. $\text{Cl}_2(aq) + \text{H}_2\text{O}(l) \rightarrow \text{H}^+(aq) + \text{Cl}^-(aq) + \text{HClO}(aq)$ The HClO then goes on to form $\text{ClO}^-$ ions. $\text{HClO}(aq) + \text{H}_2\text{O}(l) \rightarrow \text{H}_3\text{O}^+(aq) + \text{ClO}^-(aq)$ Both HClO and $\text{ClO}^-$ destroy bacteria through oxidation. What is the net change in oxidation number of chlorine when the $\text{ClO}^-$ ion is formed from aqueous chlorine?
- A$-1$
- B$0$
- C$+1$
- D$+2$