30.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 43.69 mL of a 0.1457 M NaOH solution.

Question

30.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 43.69 mL of a 0.1457 M NaOH solution.What is the concentration of the H2SO4 solution?

Answer 1

H2SO4 is diprotic; it can give off 2 protons. So, 1 mol of H2SO4 neutralizes 2 moles of NaOH

MV = MV

43.69 x 0.1457 x 2 = 30 x M

M = 0.4244 (mol/L of H2SO4)