Patterns of Reactivity 16/05/2019 Patterns of Reactivity W Richards Worthing High School

Properties of metals and non-metals 16/05/2019 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

Reactions of metals with oxygen 16/05/2019 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 Mg O Copy and complete the following reactions: Magnesium + oxygen Copper + oxygen Calcium + oxygen Iron + oxygen

Reactions of metals with water 16/05/2019 When a metal reacts with water hydrogen is always given off. The other product will be either a metal hydroxide or a metal oxide. METAL + WATER METAL OXIDE + HYDROGEN METAL + WATER METAL HYDROXIDE + HYDROGEN Copy and complete the following reactions: Sodium + water Potassium + water Calcium + water Iron + steam

Reactions of metals with acids 16/05/2019 METAL + ACID SALT + HYDROGEN e.g. magnesium + hydrochloric acid magnesium chloride + hydrogen Mg H Cl Copy and complete the following reactions: Calcium + hydrochloric acid Zinc + hydrochloric acid Iron + hydrochloric acid Lithium + sulphuric acid

Complete the following reactions: 16/05/2019 Lithium + water Lithium + hydrochloric acid Silver + oxygen Magnesium + sulphuric acid Potassium + oxygen Aluminium + oxygen Manganese + water Sodium + sulphuric acid Lithium + oxygen 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

Name the following compounds: 16/05/2019 For example: HS = Hydrogen sulphide Na2CO3 = sodium carbonate CO2 KBr HI NaCl CaCO3 MgCO3 MgSO4 KMnO4 Carbon dioxide Potassium bromide Hydrogen iodide Sodium chloride Calcium carbonate Magnesium carbonate Magnesium sulphate Potassium permanganate

Increasing reactivity The Reactivity Series 16/05/2019 Increasing reactivity Potassium Sodium Calcium Magnesium Aluminium Carbon Zinc Iron Lead Copper Silver Gold The Reactivity Series lists metals in order of reactivity:

Displacement reactions 16/05/2019 A displacement reaction is one where a MORE REACTIVE metal will DISPLACE a LESS REACTIVE metal from a compound. Mg Magnesium SO4 Cu Copper sulphate The magnesium DISPLACES the copper from copper sulphate SO4 Mg Magnesium sulphate Cu Copper Magnesium + copper sulphate magnesium sulphate + copper

Some example reactions… 16/05/2019 Reaction Prediction Observations Zinc + copper sulphate Zinc + lead nitrate Copper + lead nitrate Copper + silver nitrate Extension work – write down the equations for these reactions

Some example reactions… 16/05/2019 Reaction Prediction Observations Zinc + copper sulphate Reaction DID happen Zinc + lead nitrate Copper + lead nitrate Reaction DID NOT happen Copper + silver nitrate Extension work – write down the equations for these reactions