Question

Use the activity series to predict if there will be a reaction in the following cases. If a reaction does not occur write “no reaction”, but if a reaction occurs, write a balanced equation.

Cu + Al2(SO4)3  

Al + Pb(NO3)2 →  

Cl2 + NaI →

 Al + CuCl2 → 

 Br2 + CaI2

Answer 1

Cu + Al₂(SO₄)₃ This reaction does not occur under the normal conditions, because Al is more reactive than Cu.

The reaction should go in the reverse:

3 Cu + Al₂(SO₄)₃ $\to$ 2 Al + 3 CuSO₄

Al + Pb(NO₃)₂ $\to$ Pb + Al(NO₃)₂

Cl₂ + 2 NaI $\to$ 2NaCl + I₂

2 Al + 3 CuCl₂ $\to$ 2 AlCl₃ + 3 Cu

Br₂ + CaI₂ $\to$ CaBr₂ + I₂