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v2.18.0
| 1. | nitrate salts | A. | all soluble in water except lead, barium and calcium |
| 2. | ammonium salts | B. | all salts are not soluble in water except for sodium, potassium and ammonium |
| 3. | chloride salts | C. | all salts are soluble in water except silver and lead (II) |
| 4. | sulphate salts | D. | all are soluble in water |
| 5. | carbonate salts | E. | all salts are soluble in water |
| 6. | hydroxide salts | F. | all are soluble in water except potassium, sodium and ammonium |
| 1. | nitrate salts → D |
| 2. | ammonium salts → E |
| 3. | chloride salts → C |
| 4. | sulphate salts → A |
| 5. | carbonate salts → B |
| 6. | hydroxide salts → F |
