Help with calculations (1 Viewer)

[Munkiie]

I need help with this question:

In an experiment, a student added 20.00ml of 0.09mol/L of nitric acid to 25.00ml of 0.11mol/L potassium hydroxide.
a) determine which substance is in excess
b) calculate the vol of 0.1mol/L KOH or HNO3 needed to neutralize the remaining solution

I can do part a, just need help with what to do in part b. I have an idea of what to do but I don't know if it's right. Please help and thanks in advance

 

[someth1ng]

For A, calculate the number of moles of nitric acid and the number of moles of potassium hydroxide. The one with more is the one in excess.

 

[Munkiie]

Yeah I know how to do that... Need part b

 

[study1234]

Then, by minusing the excess moles by the one with lower moles, you can calculate how many hydrogen/hydroxide ions are remaining. Therefore, the number of moles of the opposite acid/base required for neutralization equals the number of remaking ion moles. Then, using the formula V=n/c, the volume of the acid/base required can be calculated.