Question
Asked Nov 26, 2019
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If 45.52 mL of a potassium permanganates solution is needed to titrage 2.145 g of ferrous ammonium sulfate hexahydratw, (NH4)2Fe(SO4)•6H2O, calculate the molarité of the KMnO4 solution.  

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Expert Answer

Step 1

Given that,

Volume of KMnO4 = 45.52mL

Mass of ferrous ammonium sulfate hexahydrate =2.145 g

Molecular mass of ferrous ammonium sulfate hexa hydrate = 392 g/mole

Step 2

Now, you calculate the no.of moles

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Given mass No.of moles Molar mass 2.145 g g 392 mole 0.0056 mole

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Step 3

The reactio...

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2KMnO4+10FeSO4+8H,SO5Fe2 (SO4) +2MnSO4+K2SO4+8H,0

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