The pH of a solution is 5.0. To this solution | vedclass

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(C) The formula for $pH$ is $pH = -\log [H^{+}]$.When $pH = 5.0$,the hydrogen ion concentration is $[H^{+}]_{1} = 10^{-5} \ M$.When the $pH$ is decrea

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$1000$

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(C) The formula for $pH$ is $pH = -\log [H^{+}]$.When $pH = 5.0$,the hydrogen ion concentration is $[H^{+}]_{1} = 10^{-5} \ M$.When the $pH$ is decreased to $2.0$,the new hydrogen ion concentration is $[H^{+}]_{2} = 10^{-2} \ M$.The increase in hydrogen ion concentration is given by the ratio $\frac{[H^{+}]_{2}}{[H^{+}]_{1}} = \frac{10^{-2}}{10^{-5}} = 10^{(-2 - (-5))} = 10^{3} = 1000$.Therefore,the concentration increases by $1000$ times.

The $pH$ of a solution is $5.0$. To this solution,sufficient acid is added to decrease the $pH$ to $2.0$. The increase in hydrogen ion concentration is $...$ times.

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