Calculate the millimoles of SeO3 2– in solution on the basis of following data:
70 ml of M /60 solution of KBrO3 was added to SeO3 2– solution.
The bromine evolved was removed by boiling and excess of KBrO3 was back titrated with 12.5 mL of M / 25 solution of NaAsO2 .
The reactions are given below.
(a) 1.6 × 10–3
(b) 1.25
(c) 2.5
(d) None of these
