Preparation Of Salts
Muhtasari
Salts are everywhere in chemistry, from the fertilisers that feed crops to the blue copper sulfate crystals grown in class. Making a pure, dry sample of a salt is a genuine craft, and the method you choose hangs on one question: is the salt you want soluble or insoluble? Get that right and the whole preparation falls into place.
In this lesson you will learn the standard routes to soluble salts, using an acid with an alkali, a metal, an insoluble base or a carbonate, and how precipitation makes insoluble salts. You will use the solubility rules to predict the right method, and learn what hydrated, anhydrous and water of crystallisation mean.
Malengo
- Describe the preparation, separation and purification of soluble salts by reaction of an acid with: (a) an alkali by titration (b) excess metal (c) excess insoluble base (d) excess insoluble carbonate.
- Describe the general solubility rules for salts: (a) s odium, potassium and ammonium salts are soluble (b) nitrates are soluble (c) chlorides are soluble, except lead and silver (d) sulfates are soluble, except barium, calcium and lead (e) carbonates are insoluble, except sodium, potassium and ammonium (f) hydroxides are insoluble, except sodium, potassium, ammonium and calcium (partially).
- Define a hydrated substance as a substance that is chemically combined with water and an anhydrous substance as a substance containing no water.
- [Supplement] Describe the preparation of insoluble salts by precipitation.
- [Supplement] Define the term water of crystallisation as the water molecules present in hydrated crystals, including CuSO •5H O and CoCl •6H O 4 2 2 2.
Maelezo ya Somo
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Preparation Of Salts. 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.
- How is a soluble salt made from an acid and an alkali? A. precipitation B. titration C. adding excess metal D. electrolysis Answer: B
- Which method is used to prepare an insoluble salt? A. titration B. adding excess carbonate C. precipitation D. distillation Answer: C
- According to the solubility rules, which chloride is insoluble? A. sodium chloride B. potassium chloride C. silver chloride D. ammonium chloride Answer: C
- Which sulfate is insoluble? A. sodium sulfate B. barium sulfate C. potassium sulfate D. ammonium sulfate Answer: B
- What term describes a substance containing no water of crystallisation? A. hydrated B. anhydrous C. aqueous D. saturated Answer: B
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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.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Preparation Of Salts? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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