Question

The following reaction can be used to produce CL2 in the laboratory.

2 KMnO4 + 8 H2SO4 + 10 KCl = 2 MnSO4 + 5 Cl2 + 8 H2O + 6 K2SO4

A.) How many moles of KMnO4 are requird to generate 1 mol of Cl2?

B.) How many grams of KMnO4 are required to generate 1 gram of Cl2?

Answer 1

From given balanced chemical reaction,

A) 5 moles Cl2 required ----> 2 moles KMnO4

1 mol Cl2 required ---> 2/5 = 0.40 mol KMnO4

B) 355.0 g Cl2 required ----> 316.0 g KMnO4

1 gram Cl2 required ---> 316.0/355.0 => 0.89 g

So,KMnO4 required = 0.89 gram