Calculate net potential for Fe2+ + Co3+ and CrO42- + MoO2 reactions

[zeromaxxx]

Homework Statement

For each reaction, give balanced chemical equations or NR (no reaction) and rationalize your answers in terms of trends in oxidation states. Calculate net potential for the reactions:

a) Fe²⁺(aq) + Co³⁺ (aq) (acidic conditions) →b) CrO₄²⁻(aq) + MoO₂(s) + H⁺ (acidic conditions) →

Homework Equations

The Attempt at a Solution

a) no reaction

b) 2CrO₄²⁻(aq) + MoO₂(s) + 4H⁺ → Cr₂O₇^2- + 2H₂O + Mo⁴⁺

Is this correct?

 

[Borek]

In the first case you are asked whether Co³⁺ is an oxidizer strong enough to oxidize Fe²⁺. Second question is similar.