Podcast
Questions and Answers
What type of titration is used to determine the concentration of an oxidizing or reducing agent in a solution?
What type of titration is used to determine the concentration of an oxidizing or reducing agent in a solution?
- Redox titration (correct)
- Acid-base titration
- Precipitation titration
- Complexometric titration
Which of the following is not a common reducing agent used in redox titrations?
Which of the following is not a common reducing agent used in redox titrations?
- Iron(II)
- Sodium thiosulfate
- Oxalic acid
- Potassium permanganate (correct)
What is the balanced equation for the reaction between iron(II) and potassium permanganate?
What is the balanced equation for the reaction between iron(II) and potassium permanganate?
- $Fe^{2+} + 2MnO4^{-} + 16H^{+} ightarrow Fe^{3+} + 2Mn^{2+} + 8H2O$
- $Fe^{2+} + 2MnO4^{-} + 10H^{+} ightarrow Fe^{3+} + 2Mn^{2+} + 5H2O$
- $2Fe^{2+} + MnO4^{-} + 8H^{+} ightarrow 2Fe^{3+} + Mn^{2+} + 4H2O$
- $Fe^{2+} + MnO4^{-} + 8H^{+} ightarrow Fe^{3+} + Mn^{2+} + 4H2O$ (correct)
What is the balanced equation for the reaction between sodium thiosulfate and iodine?
What is the balanced equation for the reaction between sodium thiosulfate and iodine?
Which of the following is used to standardize a potassium manganate(VII) solution?
Which of the following is used to standardize a potassium manganate(VII) solution?
What is the purpose of calculating the volume and moles of reactants in a redox titration?
What is the purpose of calculating the volume and moles of reactants in a redox titration?
Study Notes
Redox Titrations
- Redox titrations determine the concentration of an oxidizing or reducing agent in a solution.
Potassium Manganate(VII) Titrations
- Potassium manganate(VII) (KMnO4) is a powerful oxidizing agent used in redox titrations.
- KMnO4 is standardized against oxalic acid solution.
- Oxalic acid reacts with KMnO4 according to the equation: C2O4^{2-} + 2MnO4^{-} + 16H^{+} → 2CO2 + 2Mn^{2+} + 8H2O.
Iron(II) Titrations
- Iron(II) (Fe2+) can be oxidized to iron(III) (Fe3+) by oxidizing agents like potassium permanganate.
- The reaction between iron(II) and potassium permanganate is: Fe^{2+} + MnO4^{-} + 8H^{+} → Fe^{3+} + Mn^{2+} + 4H2O.
Sodium Thiosulfate Titrations
- Sodium thiosulfate (Na2S2O3) is a common reducing agent used in redox titrations.
- Sodium thiosulfate is often used to standardize an iodine solution.
- The reaction between sodium thiosulfate and iodine is: 2S2O3^{2-} + I2 → S4O6^{2-} + 2I^{-}.
Reaction Volume Calculation and Moles
- In redox titrations, it's essential to calculate the volume and moles of reactants used.
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Description
Learn about redox titrations involving potassium manganate(VII) and iron, including the standardization process against oxalic acid. This quiz covers the principles and specific procedures of redox titrations for these substances.
