Give the 4 state symbols and describe what each symbol means.

(s) = solid

(l) = liquid

(g) = gas

(aq) = aqueous solution (dissolved in water)

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Describe, in terms of atoms, how to tell whether an equation is balanced.

A balanced equation should have the same number of atoms on the reactant and product sides of the equation.

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What 2 things must be the same in a balanced ionic equation?

1Same number of atoms of each element on each side of the equation.

2Same total charge of each side of the equation.

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What is a spectator ion?

A spectator ion is an ion that does not take part in a reaction.

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Describe the steps in obtaining the ionic equation from a full balaned symbol equation.

  1. Re-write the balanced symbol equation showing the formulae of all aqueous ions present.
  2. Cancel the spectator ions (ions that appear on both sides of the equation).
  3. Check ionic charges balance on both sides.

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