Using state symbols in chemical equations

State symbols give more information about the reactants and products.

State symbolMeaning
(aq)aqueous (dissolved in water)

An iron nail is placed in a solution of blue copper(II) sulfate. Over time, a brown solid appears and the solution becomes colourless. This is because copper and a solution of iron(II) sulfate forms.

Add state symbols to the balanced chemical equation for the reaction of iron with copper(II) sulfate.

Fe + CuSO4 → FeSO4 + Cu

Fe(s) + CuSO4(aq) → FeSO4(aq)+ Cu(s)

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