Question

Using the activity series provided. Which reactants will form products?

Na > Mg > Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag
Ag +NaNO3 Right arrow.
Fe + Al2O3 Right arrow.
Ni + NaCl Right arrow.
Fe + Cu(NO3)2 Right arrow.

Answer 1

Only Fe + Cu(NO3)2 will react.

Brief reasoning:
- Ag + NaNO3: No — Ag is less reactive than Na, so it cannot displace Na+.
- Fe + Al2O3: No — Fe is less reactive than Al, so it cannot reduce Al2O3.
- Ni + NaCl: No — Ni is less reactive than Na, so it cannot displace Na+.
- Fe + Cu(NO3)2: Yes — Fe is more reactive than Cu and will displace Cu2+.

Net single-displacement equation (aqueous):
Fe(s) + Cu(NO3)2(aq) → Fe(NO3)2(aq) + Cu(s)