Chem Metals Worksheet

Topic 17: Metals – The Reactivity Series Date: ………………..…….. For this topic, candidates should be able to:  Describe the general properties of metals as solids having high melting and boiling points, malleable, good conductors of heat and electricity in terms of their structure.  Describe alloys as mixture of a metal with another element, e.g. brass; stainless steel  Identify representations of metals and alloys from diagrams of structures  Explain why alloys have different physical properties to their constituent elements  Place in order of reactivity calcium, copper, (hydrogen), iron, lead, magnesium, potassium, silver, sodium and zinc by reference to o the reactions, if any, of the metals with water, steam and dilute hydrochloric acid, o the reduction, if any, of their oxides by carbon and/or by hydrogen  Describe the reactivity series as related to the tendency of a metal to form its positive ion, illustrated by its reaction with o the aqueous ions of the other listed metals o the oxides of the other listed metals  Deduce the order of reactivity from a given set of experimental results  Describe the action of heat on the carbonates of the listed metals and relate thermal stability to the reactivity series Multiple Choice Questions 1 Brass is an alloy of copper and zinc. Why is brass harder than pure copper? A The zinc atoms form strong covalent bonds with copper atoms. B The zinc atoms prevent layers of copper atoms from slipping over each other easily. C The zinc atoms prevent the ‘sea of electrons’ from moving freely in the lattice. D Zinc atoms have more electrons than copper atoms. ( ) 2 Which of these combinations will not result in a displacement reaction? A magnesium and calcium nitrate solution. B iron and lead(II) nitrate solution. C tin and silver nitrate solution. D zinc and copper(II) nitrate solution. ( ) 3 A student made the following observations in the laboratory: I Metal X did not react with aqueous nitrate solution of Y. II Metal Y dissolved in the aqueous nitrate solution of Z and crystals of Z appeared. III Metal Z did not react with the aqueous nitrate solution of X. The order of increasing reactivity of the three metals would therefore appear to be A Y, X, Z B X, Z, Y C X, Y, Z D Z, X, Y ( ) �

4 Carbon at red heat will remove the oxygen from the oxides of the metals P, Q and R but not from the oxide of metal S. Metal R will remove oxygen from the oxide of P, but not from the oxide of Q. The order of decreasing reactivity of the four metals would be A S, P, R, Q B P, Q, R, S C S, Q, R, P D P, R, Q, S ( ) 5 Which statement about the metals iron, lead and copper is correct? A They react with warm, dilute hydrochloric acid with evolution of hydrogen. B Their sulfates are soluble in water. C All their compounds are coloured. D Their carbona