The pH of a buffer solution containing 0.1MCH3COOH and 0.1MCH3COONa is 4.74. What will be the pH if 0.05mole of HCl is added to one litre of this buffer solution? Ka(CH3COOH)=1.8×10−5.
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Solution
For 0.1MCH3COOH & 0.1CH3COONa
pH=pKa+log0.10.1=Pka
PKa=4.74−(1)
When 0.05 moles of HCl is added to 1Lit of the solution