Year 9- Acids, Bases and Salts

Acids, Bases and Salts:

• Metal oxides and Hydroxides are bases.
  • Soluble hydroxides are called alkalis.
• Acid + Base ---> Salt + Water
  • Neutralisation Reaction
• The salt produced in any reaction between an acid and a base or alkali depends on:
  • The Acid used in the reaction
    • Hydrochloric Acid produces Chlorides
    • Nitric Acid produces Nitrates
    • Sulfuric Acid produces Sulfates
  • The metal that is present in the base or alkali.
• A solution of limewater (calcium hydroxide in water) reacts with Carbon Dioxide to produce Calcium Carbonate.
  • Therefore limewater is used as a test for Carbon Dioxide
    • Carbon Dioxide turns limewater cloudy.
• Hydrogen ions, H ⁺, make solutions acidic. 
• Hydroxide ions, OH⁻, make solutions alkaline.
• The Ph scale is a measure of the acidity or alkaliity of a solution

• In a Neutralisation Reaction, hydrogen ions react with…