Posted by TROUBLED on .
calculate the volume of mL of a 1.420 M NaOH solution required to titrate the following solution. 25.00 mL of a 1.500 M H3PO4 solution

chemistry 
bobpursley,
Normalityacid*volumeacid=Normalitybase*volumebase
3*1.5*25ml=1.420*V
solve for Volume V