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)

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.

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.