What is the concentration of a phosphoric acid solution of a 25.00 ml sample if the acid requires 42.24 ml of 0.135 m naoh for neutralization? explain your steps.

The volume of 0.10 M NaOH required to neutralize 30 ml of 0.10 M HCl is, 30 ml.

Explanation:

According to the neutralization law,

where,

= molarity of NaOH solution = 0.135 M

= volume of NaOH solution = 42.24 ml

= molarity of solution = ?M

= volume of solution = 25 ml

= valency of = 1

= valency of = 3

Therefore, the concentration of 0.076 M of phosphoric acid of a 25 ml is required to neutralize 42.24 ml of 0.135 M NaOH.