pH of sodium hydroxide

pH of sodium hydroxide

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This image is part of the sequence Science: pH indicator scale examples (universal indicator)


Caption: pH of sodium hydroxide being tested using universal indicator paper (close-up at upper right). Universal indicator paper is used to measure the strength of an acid or an alkali. When a sample of the solution is added to the paper, the paper changes colour depending on the solution's pH. Yellow is neutral (pH 7), whereas orange and red are acidic, and green and dark blue are alkaline. Here, the result is a dark blue, which is very alkaline.

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Keywords: acid-base, alkaline, alkalinity, analysing, analysis, base, basic, chemical, chemistry, close-up, colour, detail, educational, experiment, glass bottle, glass rod, inset, laboratory, naoh, paper, ph indicator, school science, science, sequence, series, sodium hydroxide, test, testing, textbook science, universal indicator

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