3.3

Question 1

Concentration definition

Answer 1

Amount of solute (mol) dissolved in each 1dm3 of solution

Question 2

How to link amount, volume and concentration

Answer 2

Amount = volume x concentration

Question 3

To convert cm3 to dm3

Answer 3

Divide by 1000

Question 4

To convert from dm3 to cm3

Answer 4

Multiply by 1000

Question 5

What is a standard solution

Answer 5

A solution of known concentration

Question 6

How standard solutions prepared

Answer 6

Dissolve exact mass of solute in solvent, make up to exact volume

Question 7

To work out g/dm3 from mol/dm3

Answer 7

Convert from mol to g

Question 8

Molar gas volume definition

Answer 8

Volume per mole of gas molecules at stated temperature and pressure

Question 9

Volume of gas depends on

Answer 9

Temperature and pressure

Question 10

RTP values are

Answer 10

About 20C

101kPa (1atm)

Question 11

Volume of 1 mol of gas at RTP

Answer 11

24dm3
Or
24,000cm3

Question 12

Equation to convert between amount in mol and volume of gas (at RTP?)

Answer 12

amount = volume/molar gas volume (which would be 24dm3 in this case)

Question 13

Assumptions for molecules making up ideal gas

Answer 13

Random motion
Elastic collisions
Negligible size
Mo intermolecular forces

Question 14

Ideal gas equation is

Answer 14

pV=nRT

Question 15

What does each letter in ideal gas equation stand for?

Answer 15

p = pressure (in Pa)
V = volume (in m3)
n = amount of gas (in mol)
R = ideal gas constant (always 8.314 J/mol/K)
T = temperature (in K)

Question 16

To convert cm3 ro m3

Answer 16

Divide by 1,000,000 (or multiply by 10^-6)

Question 17

To convert dm3 to m3

Answer 17

Divide by 1000 (or multiple 10^-3)

Question 18

To convert from degrees C to K

Answer 18

+273

Question 19

To convert from kPa to Pa

Answer 19

Multiply by 1000