At 25 °C, what is the hydroxide ion concentration, [OH−] , in an aqueous solution with a hydrogen ion concentration of [H+]=1.9×10−9 M?

The correct answer will be "5.26 × 10⁻⁶".

Explanation:

The given values is:

As we know,

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On taking log, we get

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Now,

Taking "log" as common, we get

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On putting the estimated value of "", we get

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