- pH and indicators . . . 
- The pH scale and some common indicators. 
- Salts and solubility. . . 
- An introduction to what a salt is, and a summary of which common ionic compounds (including salts) are soluble in water. 
- Reactions between acids and metals . . . 
- This expands on the section on acids and metals that you may have read about in the Reactivity Series section.  It also discusses weak and strong acids. 
- Reactions between acids and metal oxides and hydroxides . . . 
- Includes common reactions like those between copper(II) oxide and dilute sulfuric acid, and sodium hydroxide solution and dilute hydrochloric acid. 
- Making soluble salts . . . 
- Experimental details of the preparation of soluble salts from the reactions between acids and metals, metal oxides or metal hydroxides. 
- Making insoluble salts . . . 
- Experimental details of the preparation of insoluble salts using precipitation reactions. 
- Reactions between acids and carbonates . . . 
- The reaction between dilute hydrochloric acid and calcium carbonate, and other similar examples. 
- Reactions between acids and ammonia . . . 
- Reactions producing ammonium salts. 
- Theories of acids and bases . . . 
- A summary of the commonest theory about what makes an acid or a base.