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This lesson covers the preparation of soluble salts for Edexcel GCSE Chemistry (1CH0). You need to understand how to name salts, describe the method for preparing a pure, dry sample of a soluble salt, and know the core practical for preparing copper sulfate crystals. This is a frequently examined topic.
A salt is a compound formed when the hydrogen in an acid is replaced by a metal (or ammonium). The name of the salt has two parts:
| Acid Used | Produces Salts Called | Example |
|---|---|---|
| Hydrochloric acid (HCl) | Chlorides | Sodium chloride (NaCl), Copper chloride (CuCl₂) |
| Sulfuric acid (H₂SO₄) | Sulfates | Copper sulfate (CuSO₄), Zinc sulfate (ZnSO₄) |
| Nitric acid (HNO₃) | Nitrates | Calcium nitrate (Ca(NO₃)₂), Magnesium nitrate (Mg(NO₃)₂) |
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