1.

Calculate the amont of SeO_(4)^(2-) in solution on thebasic of the following data. 20mL of M//60 solution of KBrO_(3) was added to a define volume of SeO_(3)^(2-) solution. The bromic evolved was removed by boiling and excess of KBrO_(3) was back titrated with 5.1mL of M//25 solution fo NaAsO_(2). The reaction are given below: (a) SeO_(3)^(2-) + BrO_(3)^(-) + H^(+) rarr SeO_(4)^(2-) + Br_(2) + H_(2)O (b) BrO_(3)^(-) + AsO_(2)^(-) + H_(2) O rarr Br^(-) + AsO_(4)^(3-) + H^(+)

Answer»


ANSWER :`0.084g`


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