Inorganic Carbon Chemistry

What is the name of the main chemical compound in limestone?

(a)  

What is the correct balanced symbol equation for the formation of calcium hydroxide?

• CaO(s) + H₂O(l) → Ca₂OH(s)

• CaO(s) + H₂O(l) → Ca(OH)₂(s)

• CaO(s) + H₂O(l) → 2CaOH₂(s)

Which of the following is a use of limestone?

• Heating with cement to make clay

• Removal of impurities from the blast furnace in the extraction of iron

• Neutralising alkaline soil for agriculture

Copper carbonate is a green solid which can be thermally decomposed easily by heating it with a Bunsen burner. The green colour disappears and a black solid is formed. A colourless gas is also formed. What is the black solid that is formed?

(a)  

Copper carbonate is a green solid which can be thermally decomposed easily by heating it with a Bunsen burner. The green colour disappears and a black solid is formed. A colourless gas is also formed. Which test would you use to confirm the identity of this gas along with the expected result?

• Put a glowing splint into a test tube filled with this gas - the glowing part of the splint will re-ignite

• Place the flame of a lighted splint into a test tube of this gas - the gas will ignite with a squeaky pop

• Bubble the gas through limewater- the limewater will turn milky

How is calcium oxide formed?

• thermal decomposition of calcium carbonate
• Displacement of calcium carbonate
• combustion of calcium carbonate
• reaction of calcium and water

How is calcium hydroxide solution produced?

• Calcium carbonate and water
• Calcium oxide and water
• Calcium carbonate and acid
• calcium oxide and acid

What do we use limewater to test for?

• Hydrogen
• Oxygen
• Carbon Dioxide
• Chlorine

I add some limestone to hydrochloric acid and I see bubbles given off. What gas is it?

• Oxygen
• Hydrogen
• Carbon dioxide
• Chlorine

Common name of aqueous calcium hydroxide

• Limestone

• Limewater

• Slaked lime

• Quicklime