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GCSE Chemistry · key term
Dissolved in water; shown by the state symbol (aq).
Used by AQA, Edexcel and OCR
Specification 4.2.2.3, 4.4.2.4 · Paper 1
Revise: Ionic Compound PropertiesThe mobile ions carry charge, so the aqueous solution conducts electricity. This explanation applies when the ionic compound has dissolved; an undissolved solid remains unable to conduct through its fixed lattice.
Specification 0.3, 0.4, 1.33, 3.22, 3.25, 8.21 · Paper 1, Paper 2
Dissolved in water; represented by the state symbol .
A substance dissolved in water.
Dissolved in water.
Describes a substance dissolved in water; it is represented by the state symbol .
Specification C3.1e, C3.1f, C3.3e, C4.2b · Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Dissolved in water; written as (aq) after a formula in a chemical equation.
Revise: Ionic EquationsThen separate the aqueous ionic substances into their ions, keeping any solid intact.
Dissolved in water to form a solution, represented by .
Dissolved in water; shown by the state symbol (aq) in a chemical equation.
A substance dissolved in water; the state symbol is (aq).
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
A solution in which a substance is dissolved in water, shown by the state symbol (aq).
Revise: Neutralisation reactionLeaving them out reveals the reacting ions: H⁺ and OH⁻. That is why the same ionic equation describes the water-forming step in aqueous neutralisation reactions involving different acids and alkalis.
“Aqueous” means dissolved in water; it does not simply mean liquid.
Avoid saying that electrons move through an ionic compound. The mobile charge carriers in molten ionic compounds and their aqueous solutions are ions.
For an aqueous electrolyte, include and from water as well as the ions named in the compound before deciding which ions are discharged.
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