Question

10 OH- + 2 Cr(OH)3 +3 Br2 --> 2 CrO4 2- +8 H2O + 6 Br-

Identify element oxidized, reduced, and both the oxidixing and reducing agents.

Answer 1

+3                0             +6                           -1  

10 OH^- + 2 Cr(OH)₃ + 3 Br₂ --> 2 CrO₄^2- + 8 H2O + 6 Br^-

        

Identify element oxidized, reduced, and both the oxidixing and reducing agents.

Species which is oxidized: A species whose oxidation number increases (Cr, oxidation number of Cr increases from +3 to +6)

Species which is reduced: A species whose oxidation number decreases (Br₂, oxidation number of Br decreases from 0 to -1)

Oxidizing agent: Species which oxidizes other but itself get reduced during reaction (Br₂)

Reducing agent: Species which reduces other but itself get oxidized during reaction, Cr(OH)₃