Reactivity Series
Akopọ
Why does a gold ring keep its shine for centuries while an iron gate slowly crumbles into rust? The answer lies in reactivity. Chemists rank metals in a league table called the reactivity series, and knowing where a metal sits in that table lets you predict what it will react with and how it can be extracted from its ore.
In this lesson you will build the reactivity series from evidence, explore reactions of metals with water and acids, investigate displacement reactions, understand rusting and how to prevent it, and connect the series to the broader ideas of oxidation and reduction.
Awọn Afojusun
- 2.16 understand how metals can be arranged in a reactivity series based on their reactions with: - water - dilute hydrochloric or sulfuric acid. understand how metals can be arranged in a reactivity series based on their displacement reactions between: - metals and metal oxides - metals and aqueous solutions of metal salts.
- know the order of reactivity of these metals: potassium, sodium, lithium, calcium, magnesium, aluminium, zinc, iron, copper, silver, gold
- know the conditions under which iron rusts
- understand how the rusting of iron may be prevented by:
- • barrier methods - galvanising - sacrificial protection. understand the terms: - oxidation - reduction - redox - oxidising agent - reducing agent in terms of gain or loss of oxygen and loss or gain of electrons.
- practical: investigate reactions between dilute hydrochloric and sulfuric acids and metals (e.g. magnesium, zinc and iron)
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Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Reactivity Series. 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 metals reacts most vigorously with dilute hydrochloric acid? A) Copper B) Iron C) Magnesium D) Zinc Answer: C
- Iron rusts in the presence of: A) Water only B) Oxygen only C) Water and oxygen D) Carbon dioxide and water Answer: C
- In the reaction Zn + CuSO4 -> ZnSO4 + Cu, zinc is: A) Reduced B) Oxidised C) Neither oxidised nor reduced D) A catalyst Answer: B
- Galvanising protects iron from rusting because: A) Zinc is less reactive than iron B) Zinc provides barrier and sacrificial protection C) Zinc dissolves in water D) Zinc is a non-metal Answer: B
- Which metal will NOT react with dilute sulfuric acid? A) Magnesium B) Zinc C) Iron D) Copper Answer: D
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Corrosion
Define corrosion
"Chemistry: Corrosion" 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/17-6-corrosion. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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Abala ìwé ẹ̀kọ́
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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Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Reactivity Series? 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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