Sapling Learning macmilan learning Enough of a monoprotic ac

Sapling Learning macmilan learning Enough of a monoprotic acid is dissolved in water to produce a 0.0130 M solution. The pH of the resulting solution is 2.60. Calculate the Ka for the acid Number K, \'O Previous O Check Answer Next Exit Hint

Solution

For a weak acid

pH = 1/2 pKa -1/2 logC

Given pH = 2.6 and C= 0.013M

Substituting the values

we get pKa = 3.314

Thus Ka = 4.85 x10^-4