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3 g of facetic acid is added to 250 mL ...

3 g of facetic acid is added to 250 mL of 0.1 HCl and the solutions made up to 500mL. To 20 mL of this solutions 5mL of 5M NaOH is added . The pH of the solutions is b/w n& n+ 1 value of 'n' is :
[Given : pKa of acetic acid = 4.75 molar mass of acetic acid =60 g/mol ]
Neglect any changes in volumes.

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