Solubility

Solubility

1. If a substance dissolves well in a particular liquid, it is known as soluble

   • However if it does not dissolve well in a liquid, it is insoluble

2. Salts can be made by reacting a acid with an alkali

3. Aspirin is an example of a pain relief tablet which is not very soluble, so when people take one they would swallow it with water

4. Salts which are soluble and insoluble in water

   • soluble
     • Na, K and NH3 (ammonium) salts
     • All nitrates
     • Most chlorides
     • Most sulphates
     • Na, K, NH4 (ammonium) carbonate
     • Na, K, NH4OH (ammonium) hydroxide
   • insoluble
     • Ag and Pb (lead) chloride
     • Pb, Ba and Ca sulphate
     • Most carbonates and Hydroxides

5. Precipitates: an insoluble product which is formed in a precipitate reaction; the formation of a solid in a solution

   • Lead nitrate and potassium iodide are salts which can both dissolve in water (soluble)
     • Both solutions react together to produce Pbl2(s) + 2KNO3(aq)
     • Lead iodide forms a yellow precipitate

6. State symbols- show if the substances are dissolved in water (aq, aqueous), solid (s), liquid (l) or a gas (g)

7. A precipitation reaction is when a insoluble liquid is produced from two soluble substances