Chapter 2: Measurement and experimental techniques

Question 1

What is the SI unit for mass?

Answer 1

Kilogram

Question 2

What is the SI unit for time?

Answer 2

seconds

Question 3

What is the SI unit for temperature

Answer 3

Kelvin

Question 4

What is the SI unit for volume?

Answer 4

cm3

Question 5

Name all methods for collecting gases:

Answer 5

• Displacement of water
• Downward delivery
• Upward delivery

Question 6

Which method for collecting insoluble/ slight soluble gases?

Answer 6

Displacement of water

Question 7

Which method for soluble gases in water that are denser than air?

Answer 7

Downward delivery

Question 8

Which method for collecting soluble gases in water and less dense than air?

Answer 8

Upward delivery

Question 9

Name gases that are soluble to extremely soluble in water

Answer 9

In increasing order: Chlorine, hydrogen chloride, sulfur dioxide, ammonia gas

Question 10

Name gases that are slightly soluble to not soluble in water

Answer 10

In decreasing order: carbon dioxide, oxygen, hydrogen

Question 11

Name gases less dense than air

Answer 11

Hydrogen and ammonia

Question 12

Name gases denser than air

Answer 12

Oxygen, CO2, chlorine, hydrogen chloride, sulfur dioxide

Question 13

Name 3 methods for drying gases

Answer 13

Concentrated sulfuric acid, quicklime and fused calcium chloride

Question 14

When do you use concentrated sulfuric acid to dry gases?

Answer 14

For most gases, like chlorine and hydrogen chloride. Cannot use for ammonia due to reaction

Question 15

When do you use quicklime to dry gases?

Answer 15

Ammonia

Question 16

When do you use fused calcium chloride to dry gases?

Answer 16

Most gases