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2015-10-18T12:21:14+08:00

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In chemistry, pH is a unit used to specify the acidity or alkalinity of a aqueous solution.
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2015-10-19T14:42:28+08:00

pH is the acidity or the alkalinity of a substance where acids will have the pH lower than 7 and alkaline or base will have the pH higher than 7 
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