C1.2 Rocks and Building Materials

Question 1

State an environmental impact of producing mortar

Answer 1

It is produced from quicklime. Quicklime is produced in a rotary kiln which produces CO₂ gas and contributes to global warming.

Question 2

Chemical Name for Limestone

Answer 2

Calcium Carbonate

Question 3

Formula for Limewater

Answer 3

Ca(OH)_2(aq)

Question 4

Equation for thermal decomposition of magnesium carbonate

Answer 4

MgCO_3(s) –> MgO_(s) + CO_2(g)

Question 5

Equation for thermal decomposition of calcium carbonate

Answer 5

CaCO3_(s) –> CaO_(s) + CO_2(g)

Question 6

Chemical name for quicklime

Answer 6

Calcium Oxide

Question 7

Equation for reaction of calcium oxide with water

Answer 7

CaO_(s) + H₂O_(l) –> Ca(OH)_2(aq)

Question 8

Formula for Slaked Lime

Answer 8

Ca(OH)₂(aq)

Question 9

Equation for reaction of calcium carbonate with hydrochloric acid

Answer 9

CaCO_3(s) + HCl_(aq) –> CaCl_2(aq) + CO_2(g) + H₂O(l)

Question 10

Name the salt produced when lime stone reacts with sulphuric acid in acid rain

Answer 10

Calcium sulphate (CaSO₄)

Question 11

Equation for reaction of lime water with carbon dioxide

Answer 11

Ca(OH)_2(aq) + CO_2(g) –> CaCO_3(s) + H₂O_(l)

Question 12

Formula for Calcium Oxide

Answer 12

CaO

Question 13

Equation for thermal decomposition of Copper Carbonate

Answer 13

CuCO_3(s) –> CuO_(s) + CO_2(g)

Question 14

Chemical name for slaked lime

Answer 14

Calcium Hydroxide (solid)

Question 15

Name one environmental impact of CO_²

Answer 15

Global warming/effects oceans

Question 16

Test for carbon dioxide

Answer 16

Lime water turns cloudy/white precipitate

Question 17

Chemical Formula for Calcium Carbonate

Answer 17

CaCO_³