The ionisation constant of an acid, K_(a) is the measure of strength of an acid. The K_(a) values of acetic acid, hypochlorous acid and formic acid are 1.74xx10^(-5), 3.0xx10^(-8) and 1.8xx10^(-4) respectively. Which of the following orders of pH of 0.1 mol dm^(-3) solutions of these acids is correct ?

The ionisation constant of an acid, K_(a) is the measure of strength o

1.	The ionisation constant of an acid, K_(a) is the measure of strength of an acid. The K_(a) values of acetic acid, hypochlorous acid and formic acid are 1.74xx10^(-5), 3.0xx10^(-8) and 1.8xx10^(-4) respectively. Which of the following orders of pH of 0.1 mol dm^(-3) solutions of these acids is correct ?
Answer» acetic acid `gt` hypochlorous acid `gt ` formic acid hypochlorous acid `gt ` acetic acid `gt ` formic acid formic acid `gt` hypochlorous acid `gt `acetic acid fromic acid `gt` acetic acid `gt ` hypochlorous acid SOLUTION :Greater the IONIZATION constant, greater is the strength of the acid. Hence, `{:(,HCO OH ,gt,CH_(3)CO OH,gt,HClO),(K_(a),1.8xx10^(_4),,1.74xx10^(-5),,3.0xx10^(-8).):}`