A KMnO_(4) solution can be standarised by titration against As_(2)O_(3 – InterviewSolution

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1.	A KMnO_(4) solution can be standarised by titration against As_(2)O_(3(s)). A 0.1156 g sample of As_(2)O_(3) requires 27.06mL of the KMnO_(4(aq.)) for its titration. What is the molarity of the KMnO_(4(aq.)) [As =75]? 5As_(2)O_(3)+4MnO_(4)^(-)+9H_(2)O+12H^(+)rarr10H_(3)AsO_(4)+4Mn^(2+)
Answer» 0.0172 M 1.0172 M 0,172 M 0.9172 M Answer :A

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