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ipn [44]
3 years ago
14

Find the Ka of nitrous acid given that a 0.20 M solution of the acid has a hydrogen ion concentration of 2.8*10-3 M. HNO2 (aq) ?

H+ (aq) + NO2- (aq)
Chemistry
1 answer:
Otrada [13]3 years ago
4 0

Answer:

3.92 x 10⁻⁵.

Explanation:

∵ [H⁺] = √(Ka.c)

∴ Ka = [H⁺]²/c = (2.8 x 10⁻³)²/(0.20) = 3.92 x 10⁻⁵.

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