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calculate the pH of a solution  at the equivalence point when 100 mL of a 0.100 M solution of acetic acid, which has a Ka value+ 1.8*10^(-5), is titrated with 0.10 M NaOH solution.
asked Apr 9, 2015 in CHEMISTRY by heather Apprentice

1 Answer

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Step 1:

The concentration of acetic acid is [HCH2H3O2] is 0.100 M.

ka for acetic acid is .

The concentration of sodium hydroxide is [NaOH] is 0.100 M.

The equation

image

Equilibrium Constant : image.

Relation between ka and kb : image.

image

Step 1:

image generates one mole of  image and one mole of image.

Let image then image.

image

Step 2:

Find the pH of the solution.

Definition of pOH: image.

image

Now image.

image

The pH of the solution is 8.872.

Solution:

The pH of the solution is 8.872.

answered Apr 9, 2015 by joseph Apprentice

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