Identification Of Ions And Gases
Gbogbo ọrọ náà
Given an unknown white powder or a colourless gas, a chemist can find out exactly what it is using a set of simple, reliable tests. A flame turns a telltale colour, a few drops of a reagent give a coloured precipitate, and a glowing splint reveals a gas. This is the chemistry of detective work.
In this lesson you will learn the flame-test colours of common metal ions, and the tests that identify gases such as hydrogen, oxygen, carbon dioxide, ammonia and chlorine. These tests let you identify substances from the evidence they give.
Ebumnobi
- [Core] Describe tests to identify the anions: (a) carbonate, CO₃²⁻, by reaction with dilute acid and then testing for carbon dioxide gas (b) chloride, Cl⁻, bromide, Br⁻, and iodide, I⁻, by acidifying with dilute nitric acid then adding aqueous silver nitrate (c) sulfate, SO₄²⁻, by acidifying with dilute nitric acid and then adding aqueous barium nitrate
- [Core] Describe tests using aqueous sodium hydroxide and aqueous ammonia to identify the aqueous cations: (a) ammonium, NH₄⁺ (b) calcium, Ca²⁺ (c) copper(II), Cu²⁺ (d) iron(II), Fe²⁺ (e) iron(III), Fe³⁺ (f) zinc, Zn²⁺ (formulas of complex ions are not required)
- [Core] Describe tests to identify the gases: (a) ammonia, NH₃, using damp red litmus paper (b) carbon dioxide, CO₂, using limewater (c) chlorine, Cl₂, using damp litmus paper (d) hydrogen, H₂, using a lighted splint (e) oxygen, O₂, using a glowing splint
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Identification Of Ions And Gases. 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.
- What flame colour does a sodium ion give? A. Lilac B. Yellow C. Red D. Green Answer: B
- What flame colour does a potassium ion give? A. Yellow B. Lilac C. Orange-red D. Blue-green Answer: B
- How is hydrogen gas identified? A. Relights a glowing splint B. Squeaky pop with a lighted splint C. Turns limewater milky D. Bleaches litmus paper Answer: B
- How is oxygen gas identified? A. Squeaky pop B. Relights a glowing splint C. Turns limewater milky D. Turns litmus red Answer: B
- Which gas turns limewater milky? A. Hydrogen B. Oxygen C. Carbon dioxide D. Ammonia Answer: C
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Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Identification Of Ions And Gases? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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