Calcium Hydroxide Synthesis Process

The video tutorial explains the synthesis of calcium hydroxide, an inert inorganic compound with various uses. It outlines two methods: starting from calcium carbonate or calcium chloride, with the latter being more efficient. The video details the required chemicals and provides a step-by-step guide for the synthesis process, including the precipitation and collection of calcium hydroxide.

What is the primary use of calcium hydroxide mentioned in the video?

• To purify water

• To make cement

• To neutralize acids

• To synthesize potassium chlorate

Which starting material is considered more efficient for synthesizing calcium hydroxide?

• Sodium hydroxide

• Hydrochloric acid

• Calcium chloride

• Calcium carbonate

Why is calcium carbonate considered a wasteful starting material for calcium hydroxide synthesis?

• It is expensive

• It is difficult to obtain

• It requires more energy

• It results in the production of calcium chloride

What is the first step in the synthesis process from calcium carbonate?

• Adding calcium chloride to water

• Mixing sodium hydroxide with water

• Adding hydrochloric acid to calcium carbonate

• Heating calcium carbonate

What is the role of excess hydrochloric acid in the synthesis process?

• To speed up the reaction

• To act as a catalyst

• To ensure complete reaction with calcium carbonate

• To neutralize sodium hydroxide

What happens when sodium hydroxide is added to the solution?

• The solution becomes neutral

• The solution becomes basic

• Calcium hydroxide precipitates

• Calcium carbonate dissolves

Why is it important to let the solution sit for several hours after mixing?

• To allow the reaction to complete

• To cool down the solution

• To let the water evaporate

• To separate calcium hydroxide from water

What is the final step in the synthesis process?

• Heating the solution

• Drying the calcium hydroxide

• Adding more sodium hydroxide

• Filtering the solution

What is the appearance of the final product after drying?

• A clear liquid

• A white powder

• A grey solid

• A yellow paste

What is the purpose of using an oven in the final step?

• To increase the reaction rate

• To remove impurities

• To melt the calcium hydroxide

• To dry the calcium hydroxide