Podcast
Questions and Answers
Which of the following salts is generally soluble in water?
Which of the following salts is generally soluble in water?
Which of these sulphites is expected to be insoluble in water?
Which of these sulphites is expected to be insoluble in water?
Which among the following is an insoluble base (hydroxide)?
Which among the following is an insoluble base (hydroxide)?
Which of the following is true if barium sulfate is mixed with hydrochloric acid?
Which of the following is true if barium sulfate is mixed with hydrochloric acid?
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What happens when ammonium carbonate is mixed in water?
What happens when ammonium carbonate is mixed in water?
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Which salt is expected to be soluble in water?
Which salt is expected to be soluble in water?
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Study Notes
Solubility
- Solubility is the ability of a substance to dissolve in a solvent to form a solution.
Solubility Rules of Salts in Water
- Nitrates: all nitrates are soluble.
- Sulphites: only sodium, potassium, and ammonium sulphites are soluble.
- Carbonates: only sodium, potassium, and ammonium carbonates are soluble.
- Phosphates: only sodium, potassium, and ammonium phosphates are soluble.
- Sodium, potassium, and ammonium salts: practically all are soluble.
- Bases (hydroxides): only potassium, sodium, calcium, barium, and ammonium hydroxides are soluble.
- Acid salts: usually soluble, e.g. Ca(HCO3)2, Ca(H2PO4)2, Mg(HCO3)2, etc.
Applications of Solubility Rules
- Solubility rules can be used to predict the outcome of a reaction between two salts.
- If an insoluble substance forms, a precipitate will be observed when two substances in solution react.
- Examples of solubility rules in action:
- Barium sulfate is insoluble in dilute hydrochloric acid.
- Barium sulphite dissolves in dilute hydrochloric acid due to a chemical reaction.
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Description
Learn about the solubility rules of salts in water, including nitrates, sulphites, carbonates, and phosphates.
