Question

Outline the steps to calculate the initial pH in the titration of a strong acid with a strong base?

Outline the steps to calculate the pH before the equivalence point of the titration of a strong acid with a strong base?

Outline the steps to calculate the pH after the equivalence point of the titration of a strong acid with a strong base?

What is the pH halfway to the equivalence point of the titration of a weak base with a strong acid?

Answer 1

Outline the steps to calculate the initial pH in the titration of a strong acid with a strong base?

strong acid is completely ionized to produce H+ ions.

so [strong acid] = [H+] for mono protic acid.

initial pH = - log [H+]

thus we can calculate the initial pH.

Outline the steps to calculate the pH before the equivalence point of the titration of a strong acid with a strong base?

before the equivalence point of the titration of a strong acid with a strong base, there are excess acid in solution.

find out the concentration of excess acid and use pH = - log [H+] which leads to the pH of solution before equivalence point.

Outline the steps to calculate the pH after the equivalence point of the titration of a strong acid with a strong base?

after equivalence point, there are excess base.

strong base are completely ionized to produce OH- ions.

Calculate the excess OH- ion concentration and then calculate the pOH.

Using pH + pOH = 14

we can calculate the pH of solution.

What is the pH halfway to the equivalence point of the titration of a weak base with a strong acid?

at half way, the concentration of acid = concentration of salt.

as salt is of strong acid and strong base.

so salt can not hydrolyzed.

thus

calculating the concentration of acid at midpoint, we calculate the pH of solution using formula pH = - log [H+].