Arsenic(III) oxide, As 2 O 3 , can be titrated with potassium bromate in aqueous solution to produce potassium bromide and arsenic acid, H 3 AsO 4 .

 Arsenic(III) oxide, As2O3 , can be titrated with potassium bromate in aqueous solution to produce potassium bromide and arsenic acid, H3AsO4 . A mixture contained arsenic(III) oxide and arsenic(V) oxide, As2O5 , and it was found that 1.000g of this mixture could be titrated in this way with 21.00 mL of 0.1000M KBrO . What is the percentage by weight of each oxide of arsenic in the mixture?