Reactivity Series
Gbogbo ọrọ náà
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.
Ebumnobi
- 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)
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Reactivity Series. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
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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Akụkụ akwụkwọ
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
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Reactivity Series? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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