Question

What species is the reducing agent in the following redox reaction? Cr(OH)??aq) + CIO.(aq) CrO42(aq) + Cl-(aq) Cl+1 in CIO-1 The reducing agent is the species thatis oxidized. Cl Crt3 in Cr(OH)4 Crt6 in Cros2 0% in Cr(OH)4

Answer 1

consider the oxidation numbers of the species

reactants :

Cr in Cr(OH)4- ---> +3

cl in ClO- ---> +2

products :

Cr in CrO42- ---> +6

Cl in Cl- ---> -1

now

oxidation is the increase in oxidation number

so Cr is undergoing oxidation

now

the species that is oxidized will act as reducing agent

so

Cr+3 in Cr(OH)4- will act as reducing agent