# Mass of KxFe(C2O4)y · zH2O : 5.60 gMass of sample : 0.155 gMass of FeCl3 used in preparation : 1.60 gMolarity of standard NaOH used : 0.100V1, volume of standard NaOH required for first equivalence point : 9.000 mLV2, volume of standard NaOH required for second equivalence point : 15.90 mLCalculate the mass of iron in the sample :

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Mass of KxFe(C2O4)y · zH2O : 5.60 g

Mass of sample : 0.155 g

Mass of FeCl3 used in preparation : 1.60 g

Molarity of standard NaOH used : 0.100

V1, volume of standard NaOH required for first equivalence point : 9.000 mL

V2, volume of standard NaOH required for second equivalence point : 15.90 mL

Calculate the mass of iron in the sample :

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Step 1

The given compound first undergoes dissociation in its aqueous solution as:

Step 2

The aqueous solution of the compound is then passed through the cation exchange resin that exchanges potassium ions for hydrogen ion. The hydrogen ions reacts with standard solution of NaOH  to give the first equivalent point. At this point, all hydrogen ions are neutralised.

Step 3

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