A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to?
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Let's go through the question once again
A buffer solution contains 0.1 mole of sodium acetate dissolved in 1000 cm3 of 0.1 M acetic acid. To the above buffer solution, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to?
pH = pKa + log ([salt] /[acid]
So in this case we consider the concentrations after addition of 0.1 molar acetic acid.
pH = 4.75 + log 0/0.2 using this because the salt added led to the increase in the concentation of acid and thus reduced the salt concentration to zero
pH= 4.47
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