Titration Problem?

Question

I understand how to do these problems, I'm just really bad at writing the equation for them. Here's the problem:
Calculate the volume in mL of a 1.420 M NaOH solution required to titrate the following solution: 25.00 mL of a 1.500 M H3PO4 solution.

I know once you get the equation you would multiply (25mL H3PO4) x 1L/1000mL x (1.5mol/1L) x (?mol NaOH/?mol H3PO4) x (1L/1.420 mol NaOH)

Thanks!

Thanks! It worked.

Answer 1

you have to find the equation to get the mol to mol conversion,

this is what i got:
3NaOH + H3PO4 -> Na3PO4 + 3H20

(25mL H3PO4) x 1L/1000mL x (1.5mol/1L) x (3mol NaOH/1mol H3PO4) x (1L/1.420 mol NaOH)