Collecting & Identifying Gases

The video tutorial explains the methods of collecting gases based on their density and solubility. It covers upward and downward delivery methods for gases less and more dense than air, respectively. It also discusses collecting gases over water and the use of a gas syringe for measuring gas volume. The tutorial provides examples like helium, carbon dioxide, and hydrogen chloride to illustrate these methods.

Why do some balloons float while others do not?

• Because of the color of the balloon

• Due to the density of the gas inside

• Because of the size of the balloon

• Due to the material of the balloon

Which method is used to collect gases that are less dense than air?

• Upward delivery

• Over water

• Gas syringe

• Downward delivery

What is the method called when collecting gases more dense than air?

• Over water

• Downward delivery

• Upward delivery

• Gas syringe

Why can't gases soluble in water be collected over water?

• They are too dense

• They dissolve in water

• They react with water

• They evaporate quickly

What is the advantage of using a gas syringe for gas collection?

• It does not require density consideration

• It is more accurate

• It is faster

• It is cheaper