owed to start and comp Lab 10 Determination of Iron by Reaction with Permanganat
ID: 1068013 • Letter: O
Question
owed to start and comp Lab 10 Determination of Iron by Reaction with Permanganate ARedox Titration. Data and calculations: Determination of Iron by Reaction with Permanganate-A Redox Titration X LMase of sample tube plus ponents Mass after removing Sample Mass removing sample standard KM Sample Initial buret reading ml. Final buret reading Volume KMnoa required ml. Moles KMno, required Moles Fe2. in sample Mass of Fe in sample 2.500 Mass of sample Percentage of Fe in sample Average Fe Standard deviation Unknown no. Standardization of KMn Sansple VI Mass of primary standard Moles Fe in standard (continued on following page)Explanation / Answer
Lets say we have FeSO4 as the Fe2+ sample
From Trial I
moles of Fe2+ = 2.56 g/151.91 g/mol
= 0.017 mol
moles of KMnO4 required = 0.017/5
= 0.0034 mol
Volume of KMnO4 used = 9.4 ml
molarity of KMnO4 = 0.0034 mmol/9.4 ml
= 0.36 mM
Similarly other two trial can be calculated and average molarity from three can be calculated
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