Further Chemical Reactions

Question 1

Combustion

Answer 1

Reacting a substance (Fuel) with Oxygen

Question 2

Complete combustion

Answer 2

Reacting a fuel with excess oxygen to produce Carbon Dioxide and Water

Question 3

Incomplete combustion

Answer 3

Reacting a fuel with insufficient oxygen so produce water and Carbon Monoxide or Carbon (Soot)

Question 4

Thermal Decomposition

Answer 4

Breaking a substance down into simpler substances using heat.

Question 5

Thermal Decomposition of Calcium Carbonate

Answer 5

Calcium Carbonate –> Calcium Oxide + Carbon Dioxide

Question 6

Thermal Decomposition of Copper Carbonate

Answer 6

Copper Carbonate –> Copper Oxide + Carbon Dioxide

Question 7

Thermal Decomposition of Zinc Carbonate

Answer 7

Zinc Carbonate –> Zinc Oxide + Carbon Dioxide

Question 8

Oxidation

Answer 8

Adding oxygen to a substance in a chemical reaction

Question 9

Reduction

Answer 9

Removing oxygen from a compound in a chemical reaction

Question 10

Oxidation of Copper in a flame (observations)

Answer 10

Red surface of copper –> Black (Copper Oxide)

Question 11

Oxidation of Iron in the damp atmosphere (observations)

Answer 11

Silvery Iron –> red/brown rust (hydrated Iron Oxide)

Question 12

Oxidation of Magnesium in a flame (observations)

Answer 12

Bright white flame - white powder forms (Magnesium Oxide).

Question 13

Reduction of Iron Oxide using Carbon

Answer 13

Produces silver metallic Iron and Carbon Dioxide

Question 14

Reduction of Copper Oxide using Carbon

Answer 14

Produces red metallic Copper and Carbon Dioxide

Question 15

Displacement Reaction (definition)

Answer 15

A more reactive element takes the place of a less reactive element in a compound

Question 16

Displacement of Copper from Copper Sulphate by Zinc (observation)

Answer 16

Blue solution loses colour and red/brown metal forms in place of zinc

Question 17

Displacement of Silver from Silver Nitrate by Copper (observation)

Answer 17

Colourless solution becomes blue and silver flakes form in place of copper.

Question 18

Exothermic Reaction

Answer 18

A reaction in which heat is given off (surroundings become hotter).

Question 19

Endothermic Reaction

Answer 19

A reaction in which heat is taken in (surroundings beocme cooler).