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Use this slideshow to help you teach the Chemical Changes topic from the EdExcel 2016 GCSE course. It covers: universal indicator and the pH scale, acids and alkalis, using different indicators, strong and weak acids, neutralisation reactions, adding acids to metals, hydroxides and carbonates, testing for hydrogen and carbon dioxide, making salts, titration, forming precipitates, electrolysis, electrolysing aqueous solutions, predicting products from electrolysis, half equations, redox reactions, purifying copper through electrolysis.

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