Disproportionates to and a species such that the equivalent mass of is

CHEMISTRY · Subjective · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

\mathrm{Cl_2}

disproportionates to

\mathrm{Cl^-}

and a species

A

such that the equivalent mass of

\mathrm{Cl_2}

71

. What is the oxidation number of chlorine in species

A