Solution: Na2SO3 reacts with HCIO4 according to the reaction Na2SO3(aq) + 2HCIO4(aq) → 2NaClO4(aq) + H2O(l) + SO2(g) You wish to provide a 50% excess of 4.61 wt% aqueous HCIO4 to react with 50.0 mL of 0.0732 M

Na₂SO₃ reacts with HCIO₄ according to the reaction 

Na₂SO₃(aq) + 2HCIO₄(aq) → 2NaClO₄(aq) + H₂O(l) + SO₂(g) 

You wish to provide a 50% excess of 4.61 wt% aqueous HCIO₄ to react with 50.0 mL of 0.0732 M Na₂SO₃. Calculate the mass of the 4.61 wt% aqueous HCIO₄ solution required to provide the 50% excess.