Calculate the ph of hcl and naoh solutions after the addition of 0.75 l of water to: (a) 100 ml of 2.5 m hcl [2]

The pH of the new HCl solution is 0.53.

Explanation:

Volume of the HCl solution

Molarity of HCl solution ,

Volume of water added = 100 mL = 0.1 L

Molarity of HCl after addition of 0.75 L of water =

Final volume of the HCl solution after addition of 0.75 L of water =

[

HCl is a monotonic acid and its  one mole will give 1 mole of hydrogen ions in aqueous solution.

Molarity of hydrogen ion =

The pH of the new HCl solution is 0.53.