Electrolysis
Akopọ
Pass an electric current through a molten salt and something remarkable happens: the compound splits apart, with a metal appearing at one electrode and a non-metal at the other. This is electrolysis, the use of electricity to break down a compound that no simple chemical reaction could.
In this lesson you will learn what electrolysis is, the meaning of the key terms electrolyte, electrode, cathode and anode, and how a molten ionic compound is decomposed. Molten lead(II) bromide is the worked example.
Awọn Afojusun
- Define electrolysis as the decomposition of an ionic compound, when molten or in aqueous solution, by the passage of an electric current.
- Identify in simple electrolytic cells: (a) the anode as the positive electrode (b) the cathode as the negative electrode (c) the electrolyte as the molten or aqueous substance that undergoes electrolysis.
- [Supplement] Describe the transfer of charge during electrolysis to include: (a) the movement of electrons in the external circuit (b) the loss or gain of electrons at the electrodes (c) the movement of ions in the electrolyte.
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Oriire fun ipari ẹkọ lori Electrolysis. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
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- Electrolysis is the breakdown of an ionic compound by: A. Heating alone B. Passing an electric current through it C. Adding water D. Adding an acid Answer: B
- An electrolyte conducts electricity when it is: A. Solid B. Molten or dissolved C. Frozen D. Pure and dry Answer: B
- The cathode in an electrolysis cell is: A. Positive and attracts positive ions B. Negative and attracts positive ions C. Negative and attracts negative ions D. Positive and attracts negative ions Answer: B
- During the electrolysis of molten lead(II) bromide, the product at the cathode is: A. Bromine B. Lead C. Oxygen D. Hydrogen Answer: B
- Inert electrodes are often made of: A. Sodium B. Carbon or platinum C. Iron D. Lead Answer: B
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Abala ìwé ẹ̀kọ́
Electrolysis
Describe electrolytic cells and their relationship to galvanic cells
"Chemistry: Electrolysis" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/17-7-electrolysis. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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