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If one mole of $Ba {(OH)}_{2}$ is added to 10 litres of water at 25 °C, the pH of the resultant solution would be

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13.3

13.0

0.7

1.7

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detailed solution

Correct option is A

Barium hydroxide is a chemical compound with the chemical formula Ba(OH)₂. The monohydrate, known as baryta or baryta-water, is one of the principal compounds of barium. This white granular monohydrate is the usual commercial form.

$Ba {(OH)}_{2}$ completely ionizes in water.

Hence, $[{OH}^{-}] = 0.2 M, pOH = - \log (0.2) = 0.7, pH = 14 - 0.7 = 13.3$

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If one mole of Ba(OH)2 is added to 10 litres of water at 25 °C, the pH of the resultant solution would be