Limestone Cycle - limestone, quicklime and slaked lime

The video tutorial explains the limestone cycle, starting with the reaction of lime water turning milky due to calcium carbonate formation. It covers the formation of limestone from marine deposits, its uses, and the thermal decomposition process in a rotary kiln to produce quicklime and carbon dioxide. The video also details the reactions of quicklime with water to form slaked lime and lime water, completing the limestone cycle. The tutorial concludes with a recap of the cycle, emphasizing the transformation of limestone through various chemical reactions.

What causes lime water to turn milky?

• Presence of calcium hydroxide

• Addition of quicklime

• Formation of calcium carbonate

• Evaporation of water

How is limestone primarily formed?

• Through the compression of marine organisms

• From the cooling of magma

• From volcanic activity

• By the erosion of mountains

What is the chemical name for quicklime?

• Calcium carbonate

• Calcium oxide

• Calcium hydroxide

• Calcium sulfate

What type of reaction is the formation of slaked lime from quicklime and water?

• Neutral

• Catalytic

• Exothermic

• Endothermic

What happens when carbon dioxide is passed through lime water?

• Lime water turns clear

• Calcium carbonate is formed

• Lime water evaporates

• Calcium hydroxide is produced