2. After completing this topic you should be able to :

3. Different metals can be reacted with pure oxygen to observe how well the react. The amount of energy given out when a metal reacts gives a measure of its reactivity. metal powder ceramic wool HEAT KMnO 4 Most reactive Least reactive

4. + + + + When m mm metals react their atoms l ll lose electrons to form their ions. This means all metals undergo an O OO OXIDATION REACTION when they react.

5. 4 mol l-1 hydrochloric or sulfuric acid metal The speed of production of hydrogen gives a measure of the reactivity of the metal. Most reactive Least reactive

6. + + + + + + + The zinc atoms are O OO OXIDISED during the reaction with an acid.

7. potassium calcium Mg powder water H2H2H2H2 magnesium Most reactive Least reactive

8. + + + + + + 2 2 2 + + 2 2 2 2 + The sodium atoms are O OO OXIDISED during the reaction with water.

9. METAL REACTION WITH : WATER ACID OXYGEN potassiumsodiumlithiumcalciummagnesiumaluminiumzincirontinleadcoppermercurysilvergold

11. + When a metal reacts with oxygen, the electrons lost by the metal are gained by the o oo oxygen molecules (O2), changing them into o oo oxide ions (O2-). + The ionic equation for magnesium reacting with oxygen shows this.

12. + + + + Complete the OXIDATION & REDUCTION examples on page 2 of the Metal Chemistry and Electricity & Chemistry Examples Booklet.