Water purity test

Water purity test

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Credit: MARK SYKES/SCIENCE PHOTO LIBRARY

Caption: Water purity test. Samples of water being tested for their pH levels. All the samples seen here are alkaline (having a pH greater than 7). This indicates that the samples are of hard water. Hard water contains dissolved minerals of calcium and magnesium. The minerals are harmless, but can cause problems with plumbing.

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Keywords: alkaline, alkalinity, chemical, chemistry, environmental science, equipment, flask, flasks, glassware, h2o, hard water, indicator solution, lab, laboratory, ph test, reacting, samples, testing, water, water sample

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