These notes provide in-depth explanations for topics 1-21 in the Chemistry IB syllabus. Examples for different exam questions are answered and explained as well as many graphs are used to explain key concepts. Topics are broken down making revision a lot easier.
COLOURLESS SOLUTION because of rule :
"
sr2t
Agt , Hgz
't
5042 soluble with all ions except Bast Pb
-
, or
, ,
, Stoichiometry DEFINITIONS
M0K The of the amount of substance , 6.02×1023 (avogadro 's constant ) of atoms
=
measure 1 mole =
ions or molecules .
Molar Mass atomic in periodic table
= The mass
(g) Of one mole of molecules → mass
given
Relative atomic mass =
The
weighted average mass of all the naturally occurring isotopes of an
element compared to the standard of carbon -12
The atomic masses the atomic in
Relative formula of the relative of species as
given
=
mass sum
the formula of an ionic
compound .
Compared to carbon -12
Avogadro constant → 6.02×1023, is the amount of particles in I mot of substance
ATOM ECONOMY →
looks at the level of efficiency of chemical reactions
by comparing the molecular mass of atoms
in the reactants with the molecular mass of useful compounds .
PERCENTAGE ATOM ECONOMY :
molewlarmassofatomsofusefulproducts-XIOO.li
molecular mass of atoms in reactants
The Mole
All chemical substances made
up of elements that composed of their constituent atoms Chemists to
equal amounts of
are are . use a
system measure
different elements
regardless of how
big their atoms are .
The mole is defined as a fixed amount ,
n
, of a substance .
Avogadro's constant
called and has 6. 02 × 1023 MOI
- "
This fixed amount is a number of particles Avogadro 's Constant it a value of
of particles
MY Calculations
number
Avogadrosconstant-Q.ee
amount in moi =
I
calculate the amount in mot ) of CO2 in Q: calculate the number of carbon atoms contained
a sample of 1. go × 1oz , molecules 1. gomo , g. µ , o
in of glucose ,
,
ncor-o.oIII.IT .IT?eIIbsooI5tt
more
↳ ↳
If :[Is
✓
'
emo , of
glucose contains :
6 0 atoms
So C
=
0.249 mot in 1.5 mots there is 9 mots of atoms
number of amount in Mol
atoms x
avogadro s constant
=
= 9 × 6.02×1023
=
5.42×1024 ( atoms
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