If an aqueous solution of sulfuric acid (H2SO4) is neutralized by 3.20 mol of sodium hydroxide (NaOH), how many moles of acid were originally present in the solution?

Answer 1

If completely neutralized, the balanced equation is
2NaOH + H2SO4 ==> Na2SO4 + 2H2O
The equation tell you that 2 moles NaOH = 1 mole H2SO4 so 3.2 moles NaOH must equal ?? moles H2SO4.