Reactivity Series
Muhtasari
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.
Malengo
- 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)
Maelezo ya Somo
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Reactivity Series. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Reactivity Series? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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