C5e- Gas volume Flashcards Preview

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Flashcards in C5e- Gas volume Deck (11)
1

What methods can you use to collect a Gas?

gas syringe
upturned measuring cylinder
upturned burette

2

What are the advantages of using a gas syringe?

can be used for any gas
allows an accurate measurement of the volume of gas produced

3

Describe the upturned cylinder or burette method

a delivery tube is used to bubble gas into an upside down measuring cylinder

4

What are the disadvantages of using the upturned cylinder or burette method?

the method cant be used for gases that dissolve in water

5

How can you measure the mass of gas that a reaction produces?

by carrying out an experiment on a mass balance. as the gas is released the mass disappearing is measured on the balance

6

What are the disadvantages of measuring the mass of a gas?

it releases gas into the room

7

What is rtp?

room temperature (25c) and pressure (1 atmosphere)

8

What is the volume of 1 mole of any gas at rtp?

24dm3

9

What is the equation to find moles?

Moles = Mass ÷ Mr

10

What is the equation linking moles, volume and 24dm3?

Moles = Volume ÷ 24

11

How would you work out the mass of 12dm3 of carbon dioxide (CO2) ?

1) moles = volume ÷ 24
12 ÷ 24 = 0.5
2) moles = mass ÷ mr
0.5 x 44 = 22g