Suppose you are titrating a sulfuric acid solution of unknown concentration with a sodium hydroxide solution according to the equation H₂SO₄ + 2NaOH₂→ H₂O + Na₂So₄
If you require 28.07 mL of 0.697 M NaOH solution to titrate 220.1 ml. of H₂SO₄, solution, what is the concentration of the H₂SO₄ solution?