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Chemical Equations

Chemical equations are used to represent chemical reactions. Both the reactants and products are given.

There is a conservation of mass and charge between the reactants and products.

The conservation of mass is shown by balancing equations.Ionic equations show the reaction of ions and electrons. As with chemical equations there is the conservation of mass and the conservation of charge between the reactants and products.State symbols are often included:aq - aqueous solutionsl - liquids - solidsg - gases.

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Specification: OCR Chemistry A (H032), AS-level, 2.1.2 Compounds, formulae and equations. Topic: Atoms, Ions and Compounds.

Key terms in this lesson

Ion
A positively or negatively charged atom or group of atoms, formed by the loss or gain of electrons.

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