Question

The two sources of Zn, that is, ZnSo4, and Zn(CH,COO)2.2H2O can be purchased
at the same price per kilogram of compound. Which is the most economical source
of Zn and by how much?​

Answer 1

Answer:

Molar mass of Zn = 65.38 g/mol

Molar mass of ZnSO4 = 161.44 g/mol

Molar mass of Zn(CH3COO)2·2H2O = 219.50 g/mol

% of Zn in ZnSO4 =65.38161.44 = 0.405 = 40.5%

% of Zn in Zn(CH3COO)2·2H2O​ = 65.38219.5 = 0.298 = 29.8%

Since there is more zinc in the ZnSO4, it is the cheaper source of zinc.

It is cheaper by0.405−0.2980.298×100=35.9%