acid - pH less than 7, alkali - pH greater than 7, neutral - pH equals 7, neutralisation - react acid and alkali to make pH7, salt - product of neutralisation, acid rain - pH around 5.6, non-metal oxides - dissolve to make acids, metal oxides - dissolve to make alkalis, indigestion tablets - neutralise excess stomach acid, soil pH - often acidic and needs neutralised with lime,

Acids, alkalis, neutralistion

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