Electrochemistry Questions and Answers

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During electrolysis of aqueous copper (II) sulphate using copper electrodes a current of 0.2 amperes was passed through the cell for 5 hours. Determine the change in mass of the cathode that occurred as a result of the electrolysis process. (Cu = 64, IF = 96500 coulombs).

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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2 answers

Aqueous copper (II) sulphate was electrolysed using the set up below.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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Explain why aqueous sodium chloride is not suitable as an electrolyte for the manufacture of sodium in the Downs process.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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Below is a simplified diagram of the Down’s cell used for the manufacture of sodium. Study it and answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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Electrode potentials for the half cells are shown below. Use the information to answer the questions that follow.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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An element F has a relative atomic mass of 88. When a current of 0.5 amperes was persed through the fused chloride of F for 20 minutes and 20 seconds, 0.278g of F were deposited at the cathode. Determine the charge on ion of F (1Faraday = 9650ºC).

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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What is a binary electrolyte.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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Explain why concentrated Sulphuric (VI) acid is a poor electrolyte and has no effect on blue litmus paper whereas 2M Sulphuric (VI) acid conducts electricity and changes blue litmus paper red.

asked Aug 17, 2021 in Chemistry Form 4 by anonymous

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Explain how the following substances conduct an electric current.

asked Jul 27, 2021 in Chemistry Form 4 by anonymous

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Aqueous Copper (II) Sulphate was electrolyzed using the set up represented by the diagram below

asked Jul 9, 2021 in Chemistry Form 4 by anony mous

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1 answer

The standard reduction potentials of two half cells are

asked Jul 7, 2021 in Chemistry Form 4 by anony mous

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Sodium is extracted from its ore by the electrolysis process. Name the chief ore from which sodium is extracted from.

asked Jul 5, 2021 in Chemistry Form 4 by anonymous

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The table gives standard reduction potentials for some half cells.

asked Jun 22, 2021 in Chemistry Form 4 by anonymous

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Draw a labelled diagram of the setup of apparatus that can be used to electrolyse lead (ll) bromide.

asked Jun 21, 2021 in Chemistry Form 4 by anony mous

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