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Chemistry, 30.12.2020 21:50 lilytimpsonx
A different brand of iron tablet was analysed by Hitration with 0.0093 mol. L" potassium
dichromate via the reaction listed below;
Cr2O72- + 6Fe2+ + 14H+ + 2Cr3+ + 6Fe3+ + 7H20
In this experiment 4 tablets were crushed and dissolved in 200 cm3 of dilute acid. 25cm3
of this solution was used in the titration. The results of the titrations were as follows;
Titration Volume dichromate (cm)
1
33.0
2
32.05
3
32.15
4
32.10
Calculate the concentration of iron used in the titration (4 dp).
C1V1/C2V2 = n/n2
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Answers: 2
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A different brand of iron tablet was analysed by Hitration with 0.0093 mol. L" potassium
dichromate...
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