Reactions of Metals

Question 1

describe what happens when metals react with other substances

Answer 1

the metal atom forms positive ions

Question 2

what is the reactivity if a metal based on

Answer 2

its tendency to form positive ions

Question 3

state how the reactivity of a metal determines its extraction

Answer 3

metals above carbon must be extracted from their ores using electrolysis

metals below carbon must be extracted from their ores by reduction using carbon: reduction involves the loss of oxygen

Question 4

what is a displacement reaction

give an example

Answer 4

where a more reactive metal can displace a less reactive metal from its compound

iron + copper sulphate = iron sulphate + copper

Question 5

what is a redox reaction

Answer 5

when reactions involve both oxidation and reduction

Question 6

state when reactions between metal and acids occur

Answer 6

they only occur if the metal is more reactive than hydrogen in the acid.

if the metal is too reactive, the reaction with the acid is too violent

Question 7

state what happens in a neutralisation reaction

Answer 7

reaction between an acid and an alkali - hydrogen ions react with hydroxide ions to produce water

Question 8

strong acids

Answer 8

completely ionised in an aqueous solution

examples: sulfuric, nitric and hydrochloric acids

Question 9

weak acids

Answer 9

only partially ionised in an aqueous solution

examples: carbonic and citric acid