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Questions and Answers
What forms a dark blue complex with triiodide ions, indicating the endpoint in certain titrations?
What forms a dark blue complex with triiodide ions, indicating the endpoint in certain titrations?
- Aluminum
- Starch (correct)
- Iron(III)
- Silver
In an oxidation/reduction titration, why must the analyte initially be in a single oxidation state?
In an oxidation/reduction titration, why must the analyte initially be in a single oxidation state?
- To make the titration process faster
- To prevent interference from excess reagent
- To enhance the color change of the indicator
- To ensure accurate titration results (correct)
What is necessary for an auxiliary reducing agent to be useful as a prooxidant or a pre reductant in titrations?
What is necessary for an auxiliary reducing agent to be useful as a prooxidant or a pre reductant in titrations?
- Interference with the standard solution
- Formation of a gas
- Color change of the solution
- Quantitative reaction with the analyte (correct)
What is a measure of the tendency of an electrochemical cell reaction to proceed toward equilibrium?
What is a measure of the tendency of an electrochemical cell reaction to proceed toward equilibrium?
Which electrode is where a reduction reaction occurs in an electrochemical cell?
Which electrode is where a reduction reaction occurs in an electrochemical cell?
What has been used as a universal reference electrode in electrochemistry?
What has been used as a universal reference electrode in electrochemistry?
What is the purpose of using sodium bismuthate in the context provided?
What is the purpose of using sodium bismuthate in the context provided?
Which of the following metals is NOT included in the list provided as good reducing agents?
Which of the following metals is NOT included in the list provided as good reducing agents?
What is the main function of a pH electrode in the clinical laboratory according to the passage?
What is the main function of a pH electrode in the clinical laboratory according to the passage?
In the context of potentimetry, what is the primary role of the liquid junction?
In the context of potentimetry, what is the primary role of the liquid junction?
Which solution is commonly used as a filling solution due to the similar mobility of its ions?
Which solution is commonly used as a filling solution due to the similar mobility of its ions?
What is the purpose of the null-balance technique in the context of potentimetry?
What is the purpose of the null-balance technique in the context of potentimetry?
What is the Ilkovic equation used to show?
What is the Ilkovic equation used to show?
What does Faraday's Law relate the number of coulombs consumed to?
What does Faraday's Law relate the number of coulombs consumed to?
In amperometry, what is the equivalence point established by?
In amperometry, what is the equivalence point established by?
What does coulometry measure in terms of current flow?
What does coulometry measure in terms of current flow?
How is electrical connection achieved between the indicator and reference electrodes in polarography?
How is electrical connection achieved between the indicator and reference electrodes in polarography?
What does amperometry measure?
What does amperometry measure?
What is the primary focus of electrochemical analyses in the clinical laboratory?
What is the primary focus of electrochemical analyses in the clinical laboratory?
Which type of cell is spontaneously produced when the external E is turned off in an electrolytic cell?
Which type of cell is spontaneously produced when the external E is turned off in an electrolytic cell?
What is the primary role of a reducing agent in a redox reaction?
What is the primary role of a reducing agent in a redox reaction?
Which of the following is NOT a common type of electrochemical analysis used in the clinical laboratory?
Which of the following is NOT a common type of electrochemical analysis used in the clinical laboratory?
What is the primary function of a salt bridge in an electrochemical cell?
What is the primary function of a salt bridge in an electrochemical cell?
Which of the following is NOT a characteristic of an oxidation-reduction titration?
Which of the following is NOT a characteristic of an oxidation-reduction titration?
What type of cell operates spontaneously and requires no external source of electrical energy?
What type of cell operates spontaneously and requires no external source of electrical energy?
What happens to a galvanic cell when one of the chemical components is depleted?
What happens to a galvanic cell when one of the chemical components is depleted?
What is the effect of the completeness of a reaction on the titration curves for oxidation/reduction reactions?
What is the effect of the completeness of a reaction on the titration curves for oxidation/reduction reactions?
What substances can function as true redox indicators?
What substances can function as true redox indicators?
What type of cell requires an external source of electrical energy for operation?
What type of cell requires an external source of electrical energy for operation?
What is formed at the cathode when electrons pass through the external meter in a galvanic cell?
What is formed at the cathode when electrons pass through the external meter in a galvanic cell?
