posted by Jackie .
20.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 39.13 mL of a 0.1061 M NaOH solution. What is the concentration of the H2SO4 solution?
volumeacid*Normality acid=volumebase*normality base
20.00*Mconc*2 = 39.13*.1061
solve for Mconce, the molarity of the H2SO4