Presentation is loading. Please wait.

Presentation is loading. Please wait.

Patterns of Reactivity. Properties of metals and non-metals Metals have very high melting points (which means that they are usually _____) whereas non-metals.

Similar presentations


Presentation on theme: "Patterns of Reactivity. Properties of metals and non-metals Metals have very high melting points (which means that they are usually _____) whereas non-metals."— Presentation transcript:

1 Patterns of Reactivity

2 Properties of metals and non-metals Metals have very high melting points (which means that they are usually _____) whereas non-metals will melt at lower ___________ All metals conduct heat and __________ very well, whereas non- metals don’t (usually) Metals are strong and ______ but bendable. Non-metals are usually _____ or they will snap. Metals will _____ when freshly cut or scratched, whereas non-metals are usually dull Metals have higher _______ than non-metals (i.e. they weigh more) Metals can be used to make ______ (a mixture of different metals) Words - alloys, electricity, solids, weak, densities, temperatures, tough, shine

3 Reactions of metals with oxygen When a metal reacts with oxygen it will form a METAL OXIDE. This is what happens when a metal rusts or burns. METAL + OXYGEN METAL OXIDE Copy and complete the following reactions: 1)Magnesium + oxygen 2)Copper + oxygen 3)Calcium + oxygen 4)Iron + oxygen Mg OO OO O O

4 Reactions of metals with water When a metal reacts with water hydrogen is always given off. The other product will be either a metal hydroxide or a metal oxide. Copy and complete the following reactions: 1)Sodium + water 2)Potassium + water 3)Calcium + water 4)Iron + steam METAL + WATER METAL OXIDE + HYDROGEN METAL + WATERMETAL HYDROXIDE + HYDROGEN

5 Complete the following reactions: 1)Lithium + water 2)Lithium + hydrochloric acid 3)Silver + oxygen 4)Magnesium + sulphuric acid 5)Potassium + oxygen 6)Aluminium + oxygen 7)Manganese + water 8)Sodium + sulphuric acid 9)Lithium + oxygen 10)Nickel + hydrochloric acid Lithium hydroxide + hydrogen Lithium chloride + hydrogen Silver oxide Magnesium sulphate + hydrogen Potassium oxide Aluminium oxide Manganese oxide + hydrogen Sodium sulphate + hydrogen Lithium oxide Nickel chloride + hydrogen

6 Name the following compounds: 1)CO 2 2)KBr 3)HI 4)NaCl 5)CaCO 3 6)MgCO 3 7)MgSO 4 8)KMnO 4 For example: HS = Hydrogen sulphide Na 2 CO 3 = sodium carbonate Carbon dioxide Potassium bromide Hydrogen iodide Sodium chloride Calcium carbonate Magnesium carbonate Magnesium sulphate Potassium permanganate

7 The Reactivity Series The Reactivity Series lists metals in order of reactivity: Potassium Sodium Calcium Magnesium Aluminium Carbon Zinc Iron Lead Copper Silver Gold

8 Some example reactions… ReactionPredictionObservations Zinc + copper sulphate Zinc + lead nitrate Copper + lead nitrate Copper + silver nitrate Extension work – write down the equations for these reactions

9 Some example reactions… ReactionPredictionObservations Zinc + copper sulphateReaction DID happen Zinc + lead nitrateReaction DID happen Copper + lead nitrateReaction DID NOT happen Copper + silver nitrateReaction DID happen Extension work – write down the equations for these reactions

10 Reactions of metals with acids Copy and complete the following reactions: 1)Calcium + hydrochloric acid 2)Zinc + hydrochloric acid 3)Iron + hydrochloric acid 4)Lithium + sulphuric acid METAL + ACID SALT + HYDROGEN e.g. magnesium + hydrochloric acid magnesium chloride + hydrogen Mg H Cl Mg Cl H H H

11 Reactions of metals carbonates with acid A metal carbonate is a compound containing a metal, carbon and oxygen. METAL CARBONATE + ACID SALT + CARBON DIOXIDE + WATER Copy and complete the following reactions: 1)Magnesium carbonate + hydrochloric acid 2)Calcium carbonate + hydrochloric acid 3)Sodium carbonate + sulphuric acid Mg H Cl Mg Cl H H H C O O O O O O C

12 Reactions of metal oxides with acid A metal oxide is a compound containing a metal and oxide. They are sometimes called BASES. For example: Mg O Na O O Al O O Magnesium oxide Sodium oxide Aluminium oxide METAL OXIDE + ACID SALT + WATER Copy and complete the following reactions: 1)Magnesium oxide + hydrochloric acid 2)Calcium oxide + hydrochloric acid 3)Sodium oxide + sulphuric acid Mg O H Cl Mg Cl H H O H

13 Neutralisation reactions A neutralisation reaction occurs when an acid reacts with an alkali. An alkali is a metal oxide or metal hydroxide dissolved in water. ACID + ALKALI SALT + WATER Na Cl H H O H Na O H Copy and complete the following reactions: 1)Sodium hydroxide + hydrochloric acid 2)Calcium hydroxide + hydrochloric acid 3)Sodium hydroxide + sulphuric acid 4)Magnesium hydroxide + sulphuric acid

14 Burning Hydrogen “POP” Recall the test for hydrogen: The reaction: Hydrogen O O Oxygen+ O H H O H H Water H H H H Notice that no carbon dioxide or carbon monoxide is produced!

15 Displacement reactions Mg Magnesium SO 4 Cu Copper sulphate The magnesium DISPLACES the copper from copper sulphate SO 4 Mg Magnesium sulphate Cu Copper A displacement reaction is one where a MORE REACTIVE metal will DISPLACE a LESS REACTIVE metal from a compound. Magnesium + copper sulphate magnesium sulphate + copper

16 Energy from Displacement Reactions In previous work we considered the reactivity series: Potassium Sodium Calcium Magnesium Aluminium Carbon Zinc Iron Lead Copper Silver Gold We also looked at displacement reactions, where a more reactive metal will displace a less reactive one from one of its compounds.

17 Energy from Displacement Reactions Example 1 – Magnesium and copper sulphate Example 2 – Zinc and copper sulphate Mg Magnesium O O Cu O O S Copper sulphate + Cu Copper Zn O O Cu O O S O O O O S Zn Zinc++Copper sulphate CopperZinc sulphate Mg O O O O S Magnesium sulphate + Lots of energy Some energy

18 Zinc rod Copper rod Filter paper soaked in potassium nitrate V Zinc sulphate Copper sulphate Electrical energy from differences in reactivity The bigger the difference in reactivity, the bigger the voltage

19 Conservation of mass in reactions In any reaction the total mass of products is the same as the total mass of the reactants Example 1 – Magnesium oxide and hydrochloric acid Mg O H Cl Mg Cl H H O H 1 x magnesium, 1 x oxygen, 2 x hydrogen and 2 x chlorine atoms Also 1 x magnesium, 1 x oxygen, 2 x hydrogen and 2 x chlorine atoms C H H H H O O O O O H H O H H C O O Example 2 – Burning methane


Download ppt "Patterns of Reactivity. Properties of metals and non-metals Metals have very high melting points (which means that they are usually _____) whereas non-metals."

Similar presentations


Ads by Google