5. Classification & Balancing of Chemical Reactions

Suppose you wanted to cause Ni²⁺ ions to come out of solution as solid Ni. Which metal could you use to accomplish this?

Which element is the best reducing agent?

Determine which of the following redox reactions will occur spontaneously in the forward direction?

a) Ni(s) + Zn²⁺(aq) → Ni²⁺(aq) + Zn(s)

b) Fe(s) + Pb⁴⁺(aq) → Fe²⁺(aq) + Pb(s)

c) Al(s) + Ag⁺(aq) → Al³⁺(aq) + Ag(s)

d) Pb(s) + Mn²⁺ (aq) → Pb²⁺(aq) + Mn(s)