3g of acetic acid is added to 250mL of 0.1 M HCL and the solution made up to 500 mL. To 20 mL of this solution \(1/2\mat…

3g of acetic acid is added to 250mL of 0.1 M HCL and the solution made up to 500 mL. To 20 mL of this solution \(1/2\mathrm{mL}\) of 5 M NaOH is added.

The pH of the solution is___________(round off to the nearest integer)

[Given: pKa of acetic acid =4.75, molar mass of acetic acid =60 g/ mol, log 3=0.4771] Neglect any changes in volume.
[JEE Main 2020, 7 Jan (Shift 2)]