Rocks And Building Materials

Question 0

Describe the test and results for carbon dioxide

Answer 0

Two tubes- calcium carbonate with heat and limewater- limewater goes cloudy

Question 1

What’s the equation for the reaction that happens inside a lime kiln?
What do we call this type of reaction called?

Answer 1

Calcium carbonate-> calcium oxide + carbon dioxide

CaCO3-> CaO+CO2

Question 2

What is the equation of calcium oxide and water

Answer 2

Calcium oxide+water-> calcium hydroxide

CaO+H2O-> Ca(OH)2

Question 3

How is limestone turned into cement?

Answer 3

Limestone is crushed and roasted in a kiln with clay to make cement

Question 4

Given cement powder, how would you make mortar?

Answer 4

Mix with sand and water

Question 5

Given cement powder, how would you make concrete?

Answer 5

Mix with sand, gravel and water

Question 6

Write the equations for the reaction between potassium carbonate and hydrochloric acid

Answer 6

Potassium carbonate+hydrochloric acid-> potassium chloride+water+carbon dioxide

K2CO3+2HCl-> 2KCl+H2O+CO2

Question 7

Explain why limewater turns cloudy when there is a positive test for carbon dioxide

Answer 7

The calcium hydroxide in limewater reacts with carbon dioxide to make a calcium carbonate precipitate, which makes the colourless solution turn cloudy- Ca(OH)2+CO2 ->CaCO3+H2O

Question 8

I.V

Answer 8

Te type of metal carbonate

Question 9

Write the word equation for the thermal decomposition copper carbonate

Answer 9

Copper carbonate-> copper oxide+ carbon dioxide

Question 10

Write the balanced symbol equation for the thermal decomposition of magnesium carbonate

Answer 10

MgCO3-> MgO+CO2