Answer to Question #167903 in General Chemistry for Aly

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

According to activity series Al is more reactive than Cu and Pb. So Al can replace these metals in a reaction but Cu can not replace Al. Hence, the first reaction is not possible.

Cu + Al2(SO4)3 = No reaction.

2 Al + 3 Pb(NO3)2= 3 Pb + 2 Al(NO3)2.

2 Al + 3 CuCl2 = 3 Cu + 2 AlCl3.

According to activity series of halogens Cl2 and Br2 is more reactive than I2. Hence Cl and Br can replace I in a reaction.

Cl2 + 2 NaI = I2 + 2 NaCl.

Br2 + CaI2 = I2 + CaBr2.