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willidietomorrow
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Please post this type of questions in the HW section using the template.
Hi I am stuck on the following question.
I know the following equations are involved but don't know the method.
Outline a plan of an experiment to determine the percentage of iron present as iron(III) in a
solution containing Fe3+(aq) and Fe2+(aq) ions. You are provided with zinc, a standard
solution of potassium dichromate(VI) and dilute sulphuric acid. Zinc can reduce Fe3+(aq) to
Fe2+(aq).
Write equations for all the reactions that occur. Explain how you would use the zinc and
how you would calculate the final answer.
solution containing Fe3+(aq) and Fe2+(aq) ions. You are provided with zinc, a standard
solution of potassium dichromate(VI) and dilute sulphuric acid. Zinc can reduce Fe3+(aq) to
Fe2+(aq).
Write equations for all the reactions that occur. Explain how you would use the zinc and
how you would calculate the final answer.
I know the following equations are involved but don't know the method.
2Fe3+ + Zn --> 2Fe2+ + Zn2+
6 Fe2+ + Cr2O7 2- + 14 H+ → 6 Fe3++ 2 Cr3+ + 7 H2O
6 Fe2+ + Cr2O7 2- + 14 H+ → 6 Fe3++ 2 Cr3+ + 7 H2O
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