In 10mL aq solution of NaOH of "pOH=1,40ml aq HCl solution `(pH=2)` and 550ml `H_(2)O` is added at `25^(@)C` .Decrease in pH of NaOH solution

To a 50 ml of 0.1 M HCl solution , 10 ml of 0.1 M NaOH is added and the resulting solution is diluted to 100 ml. What is change in pH of the HCl solution ?

Find volume of H_(2)O (in Litre) added to make 500ml, 1 M NaOH(aq) solution to 1/9 M.

A solution containing 75 mL of 0.2M HCI and 25 mL of 0.2M NaOH. Calculate the pH of solution.

When 100 ml of M/10 NaOH solution and 50 ml of M/5 HCI solution are mixed, the pH of resulting solution would be