Electrolysis
Bayani Gaba-gaba
Strip away the wrapper of an aluminium can or look at the shine on a chrome-plated tap, and you are seeing the results of electrolysis. This process uses electricity to break down ionic compounds into their elements, powering industries from metal refining to water purification.
In this lesson you will discover why ionic substances only conduct when molten or dissolved, trace the movement of anions and cations to their electrodes, write half-equations for the reactions that happen there, and predict the products of several key electrolysis experiments that appear regularly on the Edexcel papers.
Manufura
- understand why covalent compounds do not conduct electricity
- understand why ionic compounds conduct electricity only when molten or in aqueous solution
- know that anion and cation are terms used to refer to negative and positive ions respectively
- describe experiments to investigate electrolysis, using inert electrodes, of molten compounds (including lead(II) bromide) and aqueous solutions (including sodium chloride, dilute sulfuric acid and copper(II) sulfate) and to predict the products
- write ionic half-equations representing the reactions at the electrodes during electrolysis and understand why these reactions are classified as oxidation or reduction
- practical: investigate the electrolysis of aqueous solutions
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Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Electrolysis. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which of the following substances can conduct electricity? A) Solid sodium chloride B) Molten sodium chloride C) Solid sugar D) Liquid wax Answer: B
- During electrolysis, positive ions migrate toward the: A) Anode B) Cathode C) Electrolyte D) Power supply Answer: B
- What is produced at the cathode during the electrolysis of aqueous copper(II) sulfate? A) Oxygen B) Hydrogen C) Copper D) Sulfur Answer: C
- In the electrolysis of dilute sulfuric acid, what gas is produced at the anode? A) Hydrogen B) Oxygen C) Chlorine D) Sulfur dioxide Answer: B
- At which electrode does oxidation occur during electrolysis? A) Cathode B) Anode C) Both electrodes D) Neither electrode Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Balancing Oxidation-Reduction Reactions
Define electrochemistry and a number of important associated terms
"Chemistry: Balancing Oxidation-Reduction Reactions" 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/17-1-balancing-oxidation-reduction-reactions. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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Yi Aikin Tambayoyin Gwaji
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