3g of acetic acid is added to 250 mL of 0.1M HCl and the solution is made up to 500 mL. To 20 mL of this solution, mL. of 5 M NaOH is added. The pH of the solution is_______.
[ Given: pKa of acetic acid = 4.75, molar mass of acertic acid = 60 g/mol, log3 = 0.4771]
Neglect any changes in volume.
Two solutions A and B each of 100L was made by dissolving 4g of NaOH and 9.8g of H2SO4 in water, respectively. The pH of the resultant solution obtained from mixing 40L of solution A and 10L of solution B is_________:
For the reaction: