Measurement Techniques

Question 1

Gas X is lighter than air + insoluble in water. Which method(s) can be used to collect X? Explain

Answer 1

• Upward deliverability because gas X is lighter than air
• Downward displacement of water as gas is insoluble or slightly soluble in water.

Question 2

X is colorless gas, which method do you use to collect?

Answer 2

Downward displacement of water because gas X is colorless

Question 3

What’s the purpose of a drying agent?

Answer 3

In order to remove moisture from sample of gas, drying agent is used

Question 4

What are some drying agents?

Answer 4

• Concentrated sulfuric acid ( H2SO4) except alkaline gases(NH3)
• Anhydrous CoCl2 or CaCl2
• Anhydrous CaO(base) except acidic gases(SO2, CO2, NO2, etc)

Question 5

Is pressure inversely proportional to volume?

Answer 5

• If pressure is increased, the particles move closer to each other, therefore volume decreases

Question 6

Is temperature directly proportional to volume?

Answer 6

• If temperature is increased then kinetic energy of the particles increases, hence the gaseous particles move further away from each other, so volume of gas increases