Q3. The Ph value of three acids A , B and C having similar concentration are 5.5 , 2.4 and 6.8 respectively. Arrange these acids in the order of their increasing acidic strength giving appropriate reason.

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Solution

The pH of acidic solution varies from 0-6.9, while that of basic solution varies from 7.1-14. Hence, the lower is the pH value, more is the acidic strength of a substance. We are given that the pH value of the given acid A, B and C is 5.5, 2.4 and 6.8 respectively. Hence, the increasing order of the acidic strengths of the acids is
C < A < B

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