Acids, Bases and Salts
Your child will master the substances behind sour taste, soapy touch and everyday salts. This chapter generally fetches about six marks, commonly pH reasoning plus salt-preparation questions. Learners test acids and bases with litmus, methyl orange and phenolphthalein, study reactions with metals, carbonates and oxides, meet the pH scale stretching from gastric juice to rain, and trace neutralisation into salt families including common salt, washing soda, baking soda and plaster of Paris, with water of crystallisation explaining their forms and uses. Three errors repeat. Students call every sa
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