Question

Balance the following: a) FeSO4-----------------------------> Fe2O3 + SO2 + SO3 b)MnO2+ HCl ---------------------> MnCl2 + Cl2 + H2O     

Answer 1

a)2FeSO4------->Fe2O3+SO2+SO3 (balanced).
b)MnO2+4HCl--------->MnCl2+Cl2+2H20 (balanced).

Answer 2

Answer: a) $2FeSO_4\rightarrow Fe_2O_3+SO_2+SO_3$

b) $MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O$

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants.

The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced by writing appropriate coefficients.

$2FeSO_4\rightarrow Fe_2O_3+SO_2+SO_3$

$MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O$