Chemical Reactions with Carbon Dioxide

The video tutorial demonstrates the reaction of carbon dioxide with lime water. It begins with the preparation of sodium carbonate and hydrochloric acid in a flask, using a thistle funnel to introduce the acid. The evolved carbon dioxide gas is passed through lime water, causing it to turn milky. When excess carbon dioxide is introduced, the milkiness disappears. The video explains the chemical reactions involved, highlighting the liberation of carbon dioxide from the reaction between dilute hydrochloric acid and sodium carbonate.

What is the first step in the experiment involving sodium carbonate?

• Mix sodium carbonate with lime water

• Take a small amount of sodium carbonate in a flat bottom flask

• Heat sodium carbonate

• Add water to sodium carbonate

What is used to add dilute hydrochloric acid to sodium carbonate?

• A pipette

• A dropper

• A thistle funnel

• A measuring cylinder

What is the characteristic of the gas evolved when sodium carbonate reacts with hydrochloric acid?

• It is colored and has a strong odor

• It is colorless and odorless

• It is colored and odorless

• It is colorless and has a strong odor

What happens to lime water when carbon dioxide is passed through it?

• It turns clear

• It turns milky

• It changes color to blue

• It remains unchanged

What is the result of passing excess carbon dioxide through lime water?

• The lime water evaporates

• The lime water turns green

• The milkiness increases

• The milkiness disappears