Please enable JavaScript.
Coggle requires JavaScript to display documents.
Mole Concept and Stoichiometry - Coggle Diagram
Mole Concept and Stoichiometry
Relative Masses (
no units, 1dp
)
Relative Atomic Mass (Ar)
Definition
RAM of an
element
is the
ratio
of the
average mass of one atom
of that element to
1/12 the mass
of an atom of
carbon-12
Found in the Periodic Table (the mass number)
Relative Isotopic Mass
Definition
RIM of a particular
isotope
is the
ratio
of the
mass of one atom
of that
isotope
to
1/12 the mass of an atom of carbon-12
.
Relative Molecular Mass (Mr)
Definition
RMM of a
molecule
is the
ratio
of the
average mass of one molecule
to
1/12 the mass
of an atom of
carbon-12
Relative Formula Mass (Mr)
Definition
RFM of an
ionic compound
is the
ratio
of the
average mass
of
one formula unit of that compound
to
1/12 the mass of an atom of carbon-12
The mole
Definition
A measure for the
amount of substance
, which is equal to
6.02x10^23
[
particles
/ elementary entities]. (6.02x10^23 is Avogadro's Constant)
One mole of (element/compound) has a mass of exactly (Ar/Mr)g. Eg: 1 mol of Cl has a mass of 35.5g
Calculations
Relationship between Amount, Number of Particles, Mass and Molar Mass
Fig 1 of
https://tinyurl.com/ChemIP3
Stoichiometry of Gases
Fig 2 of
https://tinyurl.com/ChemIP3
Limiting Reagent
The one that is
completely used up
in the reaction.
Determines
the amount of
products
formed
Calculation Approach: Fig 6 of
https://tinyurl.com/ChemIP3
Percentages
Percentage Composition by Mass: Fig 3 of
https://tinyurl.com/ChemIP3
Percentage Yield: Fig 4 of
https://tinyurl.com/ChemIP3
Percentage Purity: Fig 5 of
https://tinyurl.com/ChemIP3
Concentrations
Fig 7 of
https://tinyurl.com/ChemIP3
Empirical and Molecular Formulae
Empirical Formula
Definition
A formula of a compound that shows the
simplest ratio
of
each type of atoms
in a compound
Determination
Fig of
https://tinyurl.com/ChemIP3
Molecular Formula
Definition
A formula of a compound that shows the
actual number
of
atoms
in a compound
Determination
Fig of
https://tinyurl.com/ChemIP3
Relationship
Fig of
https://tinyurl.com/ChemIP3
Stoichiometry of Gases
Avogadro's Law
Law:
Equal volumes
of
all gases
contain the
same number of particles
at the
same temperature and pressure
.
Implied: When 2 gases are measured at
same t & p
,
Mole ratio = Volume Ratio
Molar Volume
The volume occupied by 1 mol of gas
stp
:
22.7
dm3mol-1
rtp
:
24.0
dm3mol-1