Question

a 45.0-ml sample of nitric acid solution is neutralized by 119.4 ml 0.200M NaOH solution. What is the molarity of the nitric acid solution?

Answer 1

The molarity  of nitric  acid  solution  is = 0.53M

calculation

calculate the  moles   of NaOH

moles =  molarity  x volume
= 119.4  x0.200 =  23.88 moles

write the   equation for reaction

NaOH  +HNO3  = NaNO3  +H2O

by  use of mole  ratio  between  NaOH  to  HNO3   which is 1:1  the  moles of HNO3  is also = 23.88 moles

molarity = moles/volume

23.88/45  =  0.53 M