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Preparation of salts
Explain how to prepare, separate, and purify soluble salts through the reaction of an acid with: (a) an alkali using titration, (b) excess metal, (c) excess insoluble base, and (d) excess insoluble carbonate.
5
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50
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35
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90 min
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CambridgeIGCSEChemistryAcids, bases and salts
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Preparation of salts outcomes5 objectives
- Explain how to prepare, separate, and purify soluble salts through the reaction of an acid with: (a) an alkali using titration, (b) excess metal, (c) excess insoluble base, and (d) excess insoluble carbonate.
- Summarize the general solubility rules for salts, noting that: (a) sodium, potassium, and ammonium salts are soluble, (b) nitrates are soluble, (c) chlorides are soluble except for lead and silver, (d) sulfates are soluble except for barium, calcium, and lead, (e) carbonates are insoluble except for sodium, potassium, and ammonium, and (f) hydroxides are insoluble except for sodium, potassium, ammonium, and partially calcium.
- Clarify the definition of a hydrated substance as one that is chemically bonded with water, and an anhydrous substance as one that contains no water.
- Explain how to prepare insoluble salts through the process of precipitation.
- Define the term 'water of crystallisation' as the water molecules found in hydrated crystals, including examples such as CuSO₄·5H₂O and CoCl₂·6H₂O.
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