Part C - The Synthesis and Analysis of an Iron Oxalato Transition Metal Complex
ID: 1033121 • Letter: P
Question
Part C - The Synthesis and Analysis of an Iron Oxalato Transition Metal Complex Lab Report
You have entered the following experimental values:
Molarity of your standardized KMnO4 solution : 0.0153 M
.
Balance the equation below for the reaction between MnO4? and C2O42?.
2MnO4? + 16H+ + 5C2O42? ? 2Mn2+ + 10CO2 + 8H2O
Calculate the corrected volumes for KMnO4:
Calculate the moles of KMnO4 added :
Calculate the moles of C2O42? in the sample :
Calculate the mass of C2O42? in the sample :
Calculate the percent of C2O42? in the sample :
Now, using the statistical treatment of data, calculate the percent of C2O42? in your sample
:
Explanation / Answer
For the given experiment,
Expt No. #1 #2 #3 #4
KMnO4 corrected volume (ml) 20.75 20.45 25.45 21.95
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moles of KMnO4 added = molarity of KMnO4 x volume of KMnO4 added
molarity of KMnO4 = 0.0153 M
Expt No. #1 #2 #3 #4
moles of KMnO4 added (mmol) 0.32 0.313 0.390 0.336
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moles C2O4^2- present in sample = moles KMnO4 x 5/2
Expt No. #1 #2 #3 #4
moles of KMnO4 added (mmol) 0.80 0.782 0.975 0.840
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mass C2O4^2- in sample = moles C2O4^2- x 88.02 g/mol
Expt No. #1 #2 #3 #4
moles of KMnO4 added (mg) 70.42 68.83 85.82 73.94
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Percent C2O4^2- in sample = mass C2O4^2- in sample x 100/mass of sample
Expt No. #1 #2 #3 #4
moles of KMnO4 added (mg) 55.45 53.77 70.34 61.62
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Average percent C2O4^2- in sample = 60.30%