Electrolysis (continued)
Bayani Gaba-gaba
Electrolysing a molten salt is one thing, but most real electrolysis is done in water solutions, where there is an extra player: the water itself. This makes the products less obvious, because hydrogen and oxygen can appear alongside, or instead of, the ions you started with.
In this lesson you will build on the basics to predict the products of electrolysing aqueous solutions, learn the rules that decide what forms at each electrode, and see how electrolysis is used in electroplating to coat objects with metal.
Manufura
- Identify the products formed at the electrodes and describe the observations made during the electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid using inert electrodes made of platinum or carbon / graphite.
- State that metals or hydrogen are formed at the cathode and that non-metals (other than hydrogen) are formed at the anode.
- Predict the identity of the products at each electrode for the electrolysis of a binary compound in the molten state.
- State that metal objects are electroplated to improve their appearance and resistance to corrosion.
- Describe how metals are electroplated.
- [Supplement] Identify the products formed at the electrodes and describe the observations made during the electrolysis of aqueous copper(II) sulfate using inert carbon / graphite electrodes and when using copper electrodes.
- [Supplement] Predict the identity of the products at each electrode for the electrolysis of a halide compound in dilute or concentrated aqueous solution.
- [Supplement] Construct ionic half-equations for reactions at the anode (to show oxidation) and at the cathode (to show reduction).
Darasin Sauti
Saurari wannan darasi a cikin manhaja
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Electrolysis (continued). 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.
- Why can electrolysing a solution give different products from the molten compound? A. The current is higher B. Water provides extra hydrogen and hydroxide ions C. The temperature is lower D. The electrodes react Answer: B
- At the cathode, if the metal is very reactive (such as sodium), the product is: A. The metal B. Hydrogen C. Oxygen D. Chlorine Answer: B
- When concentrated sodium chloride solution is electrolysed, the anode product is: A. Oxygen B. Hydrogen C. Chlorine D. Sodium Answer: C
- When copper(II) sulfate solution is electrolysed with inert electrodes, the cathode product is: A. Hydrogen B. Copper C. Oxygen D. Sulfur Answer: B
- In electroplating, the object to be coated is made the: A. Anode B. Cathode C. Electrolyte D. Power supply 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
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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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
Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Electrolysis (continued)? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
