Calculate the pH and fraction of dissociation ( α ) for each of the acetic acid ( CH 3 COOH , p K a = 4.756 ) solutions. A 0.00225 M solution of CH 3 COOH .

The degree of dissociation of acetic acid is 0.08448.

The pH of the solution is 3.72.

Explanation:

The

The value of the dissociation constant =

Initial concentration of the acetic acid = [HAc] =c = 0.00225

Degree of dissociation = α

Initially

c

At equilibrium ;

(c-cα)                                cα        cα

The expression of dissociation constant is given as:

Solving for α:

α = 0.08448

The degree of dissociation of acetic acid is 0.08448.

The pH of the solution ;