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What is the purpose of a chloride coulometer?
What is the purpose of a chloride coulometer?
- To generate Ag+ ions in a conducting solution.
- To measure the increase in conductivity using amperometry.
- To remove insoluble silver chloride from a solution.
- To measure the quantity of electricity used in an electrochemical system. (correct)
What is the significance of the increase in conductivity in a chloride coulometer?
What is the significance of the increase in conductivity in a chloride coulometer?
- It indicates the endpoint of the titration. (correct)
- It indicates the duration of the current.
- It indicates the generation of Ag+ ions.
- It indicates the formation of insoluble silver chloride
What is the advantage of using a chloride coulometer in analytical chemistry?
What is the advantage of using a chloride coulometer in analytical chemistry?
- It generates Ag+ ions in a conducting solution.
- It removes insoluble silver chloride from a solution.
- It is a precise method for measuring the amount of chloride in a sample (correct)
- It measures the increase in conductivity using amperometry.
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Study Notes
- A chloride coulometer uses Faraday's law to measure the quantity of electricity used in an electrochemical system.
- The quantity of electricity is measured in coulombs, and a current of 1 ampere constitutes 1 coulomb of electricity flowing per minute.
- The number of equivalent weights of reactant oxidized or reduced depends on the duration of the current if the current is constant.
- In the chloride coulometer, Ag+ ions are generated by passing a direct current across a pair of silver electrodes in a conducting solution containing the sample to be assayed for chloride.
- The Ag+ ions combine with chloride to form insoluble silver chloride, which is removed from the solution.
- The endpoint of the titration is indicated by an increase in conductivity of the solution.
- Amperometry is used to measure the increase in conductivity.
- The chloride coulometer is used to measure the amount of chloride in a sample.
- The method is accurate and precise.
- The coulometer is widely used in analytical chemistry.
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