balance the reaction of copper (ii) sulfate with cobalt to form a Co+3 compound

Answer 1

This would be a single replacement / redox reaction where Cu²⁺(aq) is reduced to Cu(s) and Co(s) is oxidized to Co³⁺.

3CuSO₄ + 2Co ==>Co₂(SO₄)₃ + 3Cu ... balanced equation.

Note however that this reaction will NOT take place spontaneously since the reduction potential for Co3+ is greater than that for Cu2+.