A600.0 ml sample of 0.20 mhf is titrated with 0.10 mnaoh. determine the ph of the solution after the addition of 600.0 ml of naoh. the ka of hf is 3.5×10? 4.

pH=12.69

Explanation:

Initial 0.12               0       0

Eqm   0.12-x           x        x

(neglecting small value of x in comparison to 0.12)

Moles of

0.06 moles of NaOH will give 0.06 moles of

Now moles of will be neutralized by moles of and moles of will be left.

Molarity of

pH = 14 - pOH= 14 - 1.31 = 12.69