Collecting & Identifying Gases

Which method of gas collection is shown in this diagram?

• Upward delivery

• Downward delivery

• Over water

• Gas syringe

Which method of gas collection is shown in this diagram?

• Upward delivery

• Downward delivery

• Over water

• Gas syringe

Look at the diagram labeled C. Which method of gas collection is shown in this diagram?

• Upward delivery

• Downward delivery

• Over water

• Gas syringe

Which method of gas collection is shown in this diagram?

• Upward delivery

• Downward delivery

• Over water

• Gas syringe

What are the properties of Hydrogen?

• Less dense than air, Insoluble in water

• Heavier than air, Soluble in water

• Colorless, Highly soluble in water

• Denser than oxygen, Reacts with water

What are the properties of Oxygen?

• Same density as air, Slightly soluble in water

• Highly soluble in water, Denser than air

• Colorless, Heavier than carbon dioxide

• Reacts vigorously with nitrogen

Which method of gas collection is most suitable for collecting a gas that is insoluble in water and less dense than air?

• Over water

• Upward delivery

• Downward delivery

• Gas syringe

Which of the following statements about the collection of gases is correct?

• Hydrogen is collected by downward delivery

• Gases insoluble in water can be collected over water

• Oxygen is always collected using a gas syringe

• Gases denser than air are collected by upward delivery

Describe how to test for carbon dioxide

• Hold damp litmus paper need the gas

• Insert a glowing splint into the tube of the gas

• Bubble some of the gas through limewater

• Insert a lit splint into a tube of the gas

What will the positive result be for carbon dioxide?

• The litmus paper will be bleached white

• The glowing splint will relight

• The limewater will go cloudy

• The gas will burn with a squeaky pop