Acids and Bases

Acids and Bases

1. Acids pH <7

   • Turn blue Litmus paper red&nbsp;
   • Examples Sulfuric Acid 1 Lemon Juice 3 Acid Rain 5

2. Bases pH >7

   • Turn red Litmus paper blue.
   • Examples Sodium Hydroxide 14 Oven Cleaner 11 Window Cleaner 10 Soap 9 Toothpaste 8

3. Indicators

   • Show by means of a colour change wheather a substance is an acid or a base
   • Litmus
     • Turns red for an acid blue for a base
   • Universal Indicator
     • Changes colour for each number on the pH scale

4. Salts

   • A salt is formed when the hydrogen in an acid is replaced by a metal ion
   • Sodium Chloride