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Question 11.5: Write the acid dissociation expression for the weak acid, ni...

Write the acid dissociation expression for the weak acid, nitrous acid.

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The equation for the dissociation of nitrous acid is written

HNO_{2}(aq) + H_{2}O(l) → H_{3}O^{+}(aq) + NO_{2}^{-}(aq)

The acid dissociation expression is written as the concentration of the products divided by the concentration of the undissociated weak acid.

K_{a}= \frac{[H_{3}O^{+}][NO_{2}^{-}]}{[HNO_{2}]}

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