Question

What is the oxidation and reduction reaction to Sc(s) + Cr₂O₇²⁻(aq) → Sc(OH)₃(s) + Cr(OH)₄⁻(aq)?

Answer 1

Oxidation

$Sc_{(s)}\to\>Sc^{3+}+3e^-$

Reduction

$Cr_{2(aq)}^{6+}+3e^-\to\>Cr^{3+}$