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what is the molarity if 24.54 ml of KMnO 4 WAS STANDARDIZED AGAINST 0.1678 g A s 2 O 3

what is the molarity if 24.54 ml of KMnO4 WAS STANDARDIZED AGAINST 0.1678 g As2O3

Grade:12

1 Answers

Arun
25750 Points
5 years ago
Molarity=moles/volume
 
Moles KMnO4=moles As2O3*(4 moles MnO4-/5 moles As2O3)
 
Moles As2O3=0.1678/197.8414
Divide given mass by molar mass.
 
Moles As2O3=0.0008486 moles
 
Moles MnO4-=0.0008486*(4/5)
 
Moles MnO4-=0.0006788
 
Molarity KMnO4=0.0006788 moles/0.02454 L or 0.0276 M

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