Amount of a substance Flashcards
1
Q
Avogadro’s Constant
A
6.02x10^23
2
Q
What does Avogadro’s number represent
A
It represents the amount of particles in one mole
3
Q
Why are first point indicators better for titration instead of universal indicator?
A
Because first point indicators have a distinct change of colour after a small pH change allowing us to get more accurate results
4
Q
What are 2 first point indicators that can be used for titration
A
- Methyl Orange
- Phenophthalein
5
Q
Concentration formula with moles
A
Concentration = Moles/Volume
6
Q
Equipment needed for titration
A
- Glass bulb pipette
- pipette filler
- Conical Flask
- First point Indicator (Methyl Orange or Phenolphthalein)
- burette
7
Q
What is a standard Solution?
A
Any solution you know the concentration of
8
Q
Equipment needed to make standard solution for titration
A
- Beaker
- weighing boat
- spatula
- distilled water
- magnetic stirring plate
-funnel - pipette
- Volumetric flask
9
Q
Formula for Atomic mass (Ar)
A
(Isotope 1 x abundance)+(Isotope 2 x abundance) divided by number of isotopes
10
Q
A
