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How are equations used to represent chemical reactions?Using state symbols in chemical equations

All substances are described by their formulae, which are used to write balanced chemical equations. Writing the formula for an ionic compound requires knowledge of the charges on its ions.

Part of Combined ScienceChemical patterns

Using state symbols in chemical equations

State symbols give more information about the and .

State symbolMeaning
(s)solid
(l)liquid
(g)gas
(aq)aqueous (dissolved in water)
State symbol(s)
Meaningsolid
State symbol(l)
Meaningliquid
State symbol(g)
Meaninggas
State symbol(aq)
Meaningaqueous (dissolved in water)

Question

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 for the reaction of iron with copper(II) sulfate.

Fe + CuSO4 鈫 FeSO4 + Cu