C3 - Quantitative Chemistry Flashcards
1
Q
What are MOLES used for?
A
Moles are used to compare a quantity of a substance.
2
Q
What is RFM (Relative Formula Mass) used for?
A
Used for compounds.
3
Q
DUE TO CONSERVATION OF MASS
A
The total mass of reactants must equal the total mass of products ( even if a gaseous product leaves )
4
Q
What is AVOGADRO’S CONSTANT?
A
1 mole = 6.02 x 10^23 atoms/molecules
5
Q
What is the EQUATION for moles?
A
Moles = mass (g) / Ar/Mr ( Mr for compounds )
6
Q
What is STOICHIOMETRY?
A
Ratio of moles of one substance to another in a reaction
7
Q
What happens when a SUBSTANCE is DISSOLVED in WATER?
A
A substance will DISSOCATE into its ions ( e.g, H+ , Cl- ), AS WELL AS THE WATER into H+ and OH-
8
Q
What are the units for CONCENTRATION?
A
g/dm^3 OR mol/dm^3
9
Q
EQUATION for CONCENTRATION
A
moles / volume (dm^3)
