Further hints to help you

1 REMEMBER, you cannot change the chemical formula of a compound in order to help to balance the equation. [Pg.143]

2 One part of the formula may be a multi-atom ion which remains intact after the reaction [e.g. the reaction shown below of sodium chloride with silver nitrate to give sodium nitrate and silver chloride, the nitrate ion (NO ) remains unchanged]. It is not necessary to count the individual atoms of the multiple atom ion separately, you can just count groups . [Pg.143]

Let us try that systematic approach on some more examples, using a table to keep the numbers clear. [Pg.143]

2NaOH + H2SO4 Na2S04 + H2O Now consider the effect on the oxygen. [Pg.143]

We have the same number of atoms of each of the elements on each side of the equation, so the equation is balanced. [Pg.144]

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