Electrolysis
Akopọ
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.
Awọn Afojusun
- 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
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
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.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Electrolysis? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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