What is a balanced chemical equation? Why should chemical equations be balanced?

Balanced Chemical Equations

A balanced chemical equation is based on

What is a chemical equation? Why are chemical equations balanced? Write a balanced chemical equation with state symbols for the following reaction: Solutions of barium chloride and sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride.

Which of these is a balanced chemical equation?

Balancing Chemical Equations