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# What are unbalanced equations and how do you balance them?

Unbalanced equations usually appear in chemical equations - both sides have different number of chemical elements. Example Original equation: NaCl + H2SO4 —> Na2SO4 + HCl As you can see there is 1 sodium on the left hand side, but there are 2 sodium ions on the right. This is same for the hydrogen. Please note that the formula compound refers to the valency and electron configurations of the ions. To balance the equation, you add a number in front of the 4 compounds to make sure both sides have equal number of ions 2NaCl + H2SO4 -> Na2SO4 + 2HCl  Faith Lee
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