7.1 The characteristic properties of acids and bases
Cambridge (CIE) IGCSE Chemistry Revision Notes
📌 Topic 7: Acids, Bases and Salts
7.1 Properties of acids and bases
1 Describe properties of acids: reactions with metals, bases, carbonates▼
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2 Describe acids in terms of effect on indicators (litmus, thymolphthalein, methyl orange)▼
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3 State that bases are oxides/hydroxides of metals; alkalis are soluble bases▼
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4 Describe properties of bases: reactions with acids, ammonium salts▼
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5 Describe alkalis in terms of effect on indicators▼
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6 State that acids contain H⁺ ions; alkalis contain OH⁻ ions▼
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7 Describe neutralisation: H⁺ + OH⁻ → H₂O▼
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8 Define acids as proton donors, bases as proton acceptors Supplement▼
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9 Define strong acids (complete dissociation) and weak acids (partial dissociation) Supplement▼
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7.2 Oxides
1 Classify oxides as acidic (SO₂, CO₂) or basic (CuO, CaO)▼
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2 Describe amphoteric oxides (Al₂O₃, ZnO) Supplement▼
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7.3 Preparation of salts
1 Describe preparation of soluble salts by reaction of acid with alkali, metal, insoluble base, insoluble carbonate▼
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2 Describe solubility rules for salts▼
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3 Define hydrated and anhydrous substances▼
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4 Describe preparation of insoluble salts by precipitation Supplement▼
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