pH scale - science lessons for life


Monday, July 2, 2018

pH scale

The pH scale is used to indicate how acidic or basic a given solution is.The scale generally consists of a series of numbers from 0 to 14. Each number corresponds to a colour.
According to this scale the pH value of neutral substances such as water is 7. The pH value of acidic solutions is less than 7 whereas the pH value of basic solutions is greater than 7. Acidity decreases from 0 to 6 while the basicity increases from 8 to 14.
pH papers
Like the litmus papers, these are available in the form of books or rolls in the laboratory. These have been prepared by mixing several indicators. The pH value can be found by dipping a pH paper in the relevant solution and comparing the colour of the paper with the colour code. Accordingly, the acidity, basicity or the neutrality of the solution can be identified. Further, it gives an idea about the strength of the acid or the base.

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