Hydrogen ion concentration in mol/L in a solution of pH= 5.4 will be

  • Option 1)

    3.98 \times 10^{8}

  • Option 2)

    3.88 \times 10^{6}

  • Option 3)

    3.68 \times 10^{-6}

  • Option 4)

    3.98 \times 10^{-6}

 

Answers (1)

As we learnt in 

The p(H) scale -

Hydronium ion concentration in molarity is more conveniently expressed on a logarithmic scale known as p(H) scale.

- wherein

The p(H) of a solution is defined as negative logarithm to base 10 of the activity of hydrogen ion

P(H)=-log[H^{+}]

 

pH=-log\left [ H^{+} \right ]

\left [ H^{+} \right ]=antilog(-pH)=antilog(-5.4)=3.98\times 10^{-6}


Option 1)

3.98 \times 10^{8}

This option is incorrect

Option 2)

3.88 \times 10^{6}

This option is incorrect

Option 3)

3.68 \times 10^{-6}

This option is incorrect

Option 4)

3.98 \times 10^{-6}

This option is correct

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