What is pH formula?

- l o g_{e} [H^{+}]

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- l o g_{10} [H^{-}]

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- l o g_{10} [O H^{-}]

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- l o g_{10} [H^{+}]

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Solution

The correct option is C $- l o g_{10} [H^{+}]$
Since, $[H^{+}] = 10^{- p H}$

Taking $l o g_{10}$ on both side, we get-

$p H = - {log}_{10} [H^{+}]$

Hence, $p H$ is defined as negative logarithm of $H^{+}$ ion concentration in the solution.

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