Blackcurrant juice indicator

Blackcurrant juice indicator

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Caption: Blackcurrant juice indicator in an alkali solution (image 2 of 2). Changes in colour (here from purple, the original colour of the juice, to green) are a common way to test the pH of a solution. Alkali and acid are the two parts of the pH scale, indicating the hydrogen ion concentration in a solution relative to that found in water. Alkalis (pH 8-14) contain fewer free hydrogen ions than water, while acids (pH 1-6) contain more. Water (pH 7) is considered neutral. See A500/520 for blackcurrant juice in an acidic solution.

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Keywords: acid-base, alkali, alkaline, analysing, analysis, analytical, base, basic, beaker, blackcurrant juice, chemical, chemistry, colour change, comparison, contrast, equipment, experiment, experimental, glassware, indicator, laboratory, one, ph, reaction, result, results, sequence, series, single, solution, solutions, test, testing

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