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Questions and Answers
What is the purpose of Zimmermanns' reagent in the titration of ferrous iron with potassium permanganate in the presence of chloride ions?
What is the purpose of Zimmermanns' reagent in the titration of ferrous iron with potassium permanganate in the presence of chloride ions?
- To enhance the oxidation potential of the MnO4-/Mn2+ system
- To form a complex with ferric iron, making the end point more visible
- To lower the oxidation potential of the Fe3+/Fe2+ system
- To prevent the oxidation of chloride ions by potassium permanganate (correct)
Why is phosphoric acid added when using standard dichromate solution for the determination of ferrous iron?
Why is phosphoric acid added when using standard dichromate solution for the determination of ferrous iron?
- To enhance the oxidation potential of the MnO4-/Mn2+ system
- To lower the oxidation potential of the Fe3+/Fe2+ system (correct)
- To form a complex with ferric iron, making the end point more visible
- To prevent the oxidation of chloride ions by potassium permanganate
What effect does phosphate ions have on the determination of ferrous iron when using Zimmermanns' reagent?
What effect does phosphate ions have on the determination of ferrous iron when using Zimmermanns' reagent?
- They prevent the oxidation of chloride ions by potassium permanganate
- They enhance the oxidation potential of the Fe3+/Fe2+ system
- They form a complex with ferric iron, making the end point more visible (correct)
- They lower the oxidation potential of MnO4-/Mn2+ system
Why is diphenylamine indicator used as an internal redox indicator in the determination of ferrous iron with standard dichromate solution?
Why is diphenylamine indicator used as an internal redox indicator in the determination of ferrous iron with standard dichromate solution?
What is the purpose of adding manganous sulphate solution to Zimmermanns' reagent?
What is the purpose of adding manganous sulphate solution to Zimmermanns' reagent?
What is the purpose of Zimmermanns' reagent in the titration of ferrous iron with potassium permanganate in the presence of chloride ions?
What is the purpose of Zimmermanns' reagent in the titration of ferrous iron with potassium permanganate in the presence of chloride ions?
What effect do phosphate ions have on the determination of ferrous iron when using Zimmermanns' reagent?
What effect do phosphate ions have on the determination of ferrous iron when using Zimmermanns' reagent?
Why is phosphoric acid added when using standard dichromate solution for the determination of ferrous iron?
Why is phosphoric acid added when using standard dichromate solution for the determination of ferrous iron?
Why is diphenylamine indicator used as an internal redox indicator in the determination of ferrous iron with standard dichromate solution?
Why is diphenylamine indicator used as an internal redox indicator in the determination of ferrous iron with standard dichromate solution?
What is the purpose of adding manganous sulphate solution to Zimmermanns' reagent?
What is the purpose of adding manganous sulphate solution to Zimmermanns' reagent?
