Topic 5 - The Reactivity Series

Question 1

List The Reactivity Series

Answer 1

Question 2

Describe how reactions of water and dilute acids can be used to deduce the following of reactivity:K, Na, Li, Ca, Mg, Al, Zn, Fe, Cu, Ag and Au

Answer 2

Question 3

Displacement Reactions

Answer 3

A more reactive metal can displace a less reactive metal from its oxide.

copper oxide + iron ► iron oxide + copper

iron is more reactive, so it takes the oxygen away from copper.

Question 4

Explain how the methods of extraction of iron and aluminium are related to their positions in the reactivity series.

Answer 4

Anything below carbon can be displaced from its ore by carbon.
Anything above carbon can’t so is extracted by electrolysis.

Question 5

Reduction

Answer 5

the loss of oxygen

Question 6

Oxidation

Answer 6

The addition of oxygen

Question 7

Oxidation reaction

Answer 7

A chemical reacts with oxygen

Question 8

Thermal decomposition reaction

Answer 8

One chemical breaks down into two or more new chemicals

Question 9

Competition reaction

Answer 9

One substance pushes out (displaces) another from its compound

Question 10

Oxidising agent

Answer 10

The substance which gives oxygen

Question 11

Reducing agent

Answer 11

The substance which takes the oxygen

Question 12

Redox

Answer 12

Oxidation and reduction reactions

Question 13

Explain the extraction of aluminium from purified aluminium oxide by electrolysis

Answer 13

Aluminium oxide is extracted from the ore BAUXITE dissolved in molten CRYOLITE.

Temperature 1500 degreese celcius large quantities of electricity used.

Question 14

Write ionic equations for the reactions at the electrodes in aluminium extraction

Answer 14

Al⁺³ ► +3e = Al

2O^2- ► O₂ + 4e