A solution is prepared using 15.0 mL of 1.0 M HCl and 20.0 mL of 0.5 M HNO3. The final volume of the solution is 1.25 L. What are the [H3O+] and [OH-] in the final solution? What is the pH of the final solution?

Question

A solution is prepared using 15.0 mL of 1.0 M HCl and 20.0 mL of 0.5 M HNO3.  The final volume of the solution is 1.25 L.  What are the [H3O+] and [OH-] in the final solution?  What is the pH of the final solution?

DrBob222 · Answer

moles HCl = M x L moles HNO3 M x L M final solution = total moles/total L.

Heather · Answer

Ok. I got 0.015 mol HCl and 0.1 mol HNO3. Do I just add the moles to get the total? So 0.115 total moles. Which would make a the Molarity of the final solution 0.92M?

Heather · Answer

I mean 0.092M.