The concentration of hydrogen ion in a sample of soft drink is 3·8 × 10^-3 M. What is its pH value?

Solution

We know,

pH space equals space minus log space open square brackets straight H to the power of plus close square brackets space space space space equals space minus log space open square brackets 3.8 space cross times space 10 to the power of negative 3 end exponent close square brackets space space space space equals space minus open square brackets log space 3.8 space plus space log space 10 to the power of negative 3 end exponent close square brackets space space space space equals space minus open square brackets 0.58 minus 3 close square brackets space space space space space equals space 2.42

Since pH of the soft drink is 2.42, therefore, it is acidic.

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