Reactivity Series
Gbogbo ọrọ náà
Some metals react violently the moment they touch water. Others sit in the ground for centuries without corroding. Arranging metals from the most reactive to the least reactive gives the reactivity series - a ranking that explains everything from how metals are extracted to why ships are fitted with zinc blocks.
In this lesson you will learn the order of the reactivity series, how it is deduced from reactions with water and acids, and how it connects to displacement reactions, rusting, and rust prevention.
Ebumnobi
- Understand how metals can be arranged in a reactivity series based on their reactions with water, and dilute hydrochloric or sulfuric acid
- 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 and galvanising
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
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 metal is the most reactive? A) Iron B) Copper C) Potassium D) Zinc Answer: C
- What are the two conditions needed for iron to rust? A) Water and carbon dioxide B) Water and oxygen C) Oxygen and nitrogen D) Water and acid Answer: B
- In a displacement reaction, a more reactive metal: A) Dissolves in the solution B) Replaces a less reactive metal from its compound C) Forms a gas D) Changes colour Answer: B
- Galvanising involves coating iron with: A) Copper B) Tin C) Zinc D) Aluminium Answer: C
- Which metal does NOT react with dilute hydrochloric acid? A) Magnesium B) Zinc C) Iron D) Copper Answer: D
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
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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