What is the concentration of hydronium ions in a solution given that the concentration of hydroxide ions is 2.31 × 10 -4 m?

 4.32 X

Explanation: Given concentration of hydroxide ions = 2.31 x

As we know that Kw ( ionic product of water) at 25 °C =

and Kw is the product of concentration of hydronium ions and hydroxide ions.

Thus,

Kw =

=   X 2.31 x

/ 2.31 x =

= 4.32 X

Thus, the concentration of hydronium ions in a solution = 4.32 X

the answer is true.

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