g Calculate the pH when (a) 24.9 mL and (b) 25.1 mL of 0.100 M HNO3 have been added to 25.0 mL of 0.100 M KOH solution.

Following are the responses to the given choices:

Explanation:

For point a:

Using the acid and base which are strong so,

moles of (from)

moles of (from )

So,   i.e. mol of in excess in total volume i.e. concentration of

Since,

so,

For point b:

moles of = from point a

moles of (from):

1 mol neutralizes 1 mol of

So, i.e. in excess in the total volume of i.e. concentration of

Hence,