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x gram of pure As 2 S 3 is completely oxidized to respective highest oxidation states by 50 ml of 0.1 M hot acidified KMnO 4 then x mass of As 2 S 3 taken is : (Molar mass of As 2 S 3 = 246)












x gram of pure As2S3 is completely oxidized to respective highest oxidation states by 50 ml of 0.1 M hot acidified KMnO4 then x mass of As2S3 taken is : (Molar mass of As2S3 = 246)

Grade:11

1 Answers

askIITIians Expert
21 Points
14 years ago

Sol.     5As2S3 + 28KMnO4 + H+ ® 10H3AsO4 + 28Mn2+ + SO42–

 

            mmoles of KMnO4 = 50 × 0.1 = 5

 

                        28 mmoles of KMnO4 ® 5 moles of As2S3

 

                        1 mmole of KMnO4 ® 5/28 moles of As2S3

 

            Mass of As2S3 = x = 246 x  g = 43.92 g

 

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