Calculate the pH of the solution obtained by mixing 100 mL 0.075(M) `Ca(OH)_2` solution with 100mL 0.1(M) HCl solution

Calculate the pH value of a solution obtained by mixing 50 mL of 0.2 N HCl solution with 50 mL of 0.1 N NaOH solution.

The pH of an aqueous solution of HCl is 3.0 and that of an aqueous solution of NaOH is 12. The pH of the solution obtained by mixing 100mL of NaOH solution with 500ml of HCI solution is-

The pH of the solution obtained by mixing 100 mL of a solution of pH=3 with 400 mL of a solution of pH=4 is

The pH of the solution obtained by mixing 100 mL of a solution of pH = 3 with 400 mL of a solution of pH = 4 is

The pH of the solution obtained by mixing 100 mL of a solution of pH = 3 with 400 mL of a solution of pH = 4 is :