how to balance chemical equations with redox reaction Cr(OH)3 + IO3{-} + OH{-} = CrO4{-2} + I{-}

Answer 1

http://chem.libretexts.org/Core/Analytical_Chemistry/Electrochemistry/Redox_Chemistry/Balancing_Redox_reactions

Go through these examples. Use the REDOX rules (all 7 of them).

Answer 2

7OH- + 5Cr(OH)3 + 3IO3- => 5CrO4-2 + 3I- + 11H2O