Identification Of Ions And Gases
Muhtasari
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.
Malengo
- 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) nitrate, NO₃⁻, reduction with aluminium foil and aqueous sodium hydroxide and then testing for ammonia gas (d) sulfate, SO₄²⁻, by acidifying with dilute nitric acid and then adding aqueous barium nitrate (e) sulfite, SO₃²⁻, by reaction with acidified aqueous potassium manganate(VII).
Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Identification Of Ions And Gases. 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.
- 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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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
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