Moles

Question 1

What should you do to determine formula of hydrated salt

Answer 1

Heat to a constant mass to ensure all water has evaporated

Question 2

What is a standard solution

Answer 2

A solution where the concentration is known

Question 3

What are concentrated and dilute solutions

Answer 3

Concentrated: lots of solute is dissolved in the solvent
Dilute: where only a little solute is dissolved in the solvent

Question 4

How to work out molar gas volumes

Answer 4

N= v(cm) /24000
N= v(dm)/24

Question 5

What is Charles/ gay lusaacs law

Answer 5

Is you keep the volume of a gas constant and you apply heat the pressure of the gas will increase

Question 6

What is avagadros law

Answer 6

Gases under the same conditions of temp and pressure and equal volume will contain the same number of moles

Question 7

What is the ideal gas equation and its units

Answer 7

Pv = nRT
P- pressure in pa (kpa x 1000)
V- volume in m^3 (dm/1000 or cm/1000000)
N- moles
R- gas constant
T - temperature in kelvin (+273)