TOPIC 7: ACIDS, BASES & SALTS

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Last updated 1:08 PM on 4/19/26
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17 Terms

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Acid

Substance that produces H+ ions in solution

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Base

Substance that neutralises an acid

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Alkali

Soluble base producing OH- ions

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pH scale

Measures acidity/alkalinity from 0 to 14

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Strong acid

Completely ionises in solution

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Weak acid

Partially ionises

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Neutralisation

Acid + base → salt + water

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General reaction (acid + metal)

Salt + hydrogen

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General reaction (acid + carbonate)

Salt + CO₂ + water

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General reaction (acid + base)

Salt + water

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Salt

Formed when H+ in acid replaced by metal or ammonium ion

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Preparation of salts

Reaction of acid with metal, base or carbonate

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Titration

Method to find exact concentration using neutralisation

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Indicator

Changes colour depending on pH

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Common indicators

Methyl orange, phenolphthalein, litmus

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Insoluble salts

Prepared by precipitation

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Precipitation reaction

Formation of solid from two solutions