Higher and foundation tier

Working out chemical formula is another useful skill which is easy to do and will improve your confidence in your chemistry work. However on this page do not worry about any of the formula just concentrate on balancing the equations, if you would like more help on working out formula then simply click on the link.

Word equation:

symbolic equation:

To balance equations the first rule is simple - DO NOT change any of the formula for the compounds. You balance equations by putting numbers in front of each of the reactants and products till the number of atoms on each side of the equations balance.

Word equation:

symbolic equation:

Word equation:

symbolic equation:

This equation can be balanced by inserting "2" as shown:

- To balance equations do not change the formulae for any of the reactants or products but simply put numbers in front of the reactant and products where necessary to balance the number of moles of each element on both sides of the equation.
- With equations containing lots of elements including hydrogen and oxygen it is often easier to balance these equations if you balance the oxygen atoms last and the hydrogen atoms second last and the other elements present in any order.