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(D) The $pH$ of a solution is defined as the negative logarithm of the hydrogen ion concentration in $mol \ L^{-1}$.Mathematically,it is expressed as

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

Vedclass · Answer

(D) The $pH$ of a solution is defined as the negative logarithm of the hydrogen ion concentration in $mol \ L^{-1}$.Mathematically,it is expressed as $pH = - \log [H^{+}]$.Alternatively,since $\log \frac{1}{[H^{+}]} = - \log [H^{+}]$,the expression $pH = \log \frac{1}{[H^{+}]}$ is also equivalent. However,the standard $IUPAC$ definition is $pH = - \log [H^{+}]$.

The definition of $pH$ is

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