1.2 Amount of Substance - AS AQA CHM1

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1.2 AMOUNT OF SUBSTANCE
Molecular
· Actual
number
of
each
type
of
atom
Formula
in
a
compound
Empirical
· Simplest
whole
number
ratio
of
Formula
atoms
in
a
compound
Avogadro's
· 6x1023
no.
of
atoms
of
12C
in
12g
of
constant
the
12C
isotope.
· Amount
of
substance
that
contains
the
Mole
same
no.
of
particles
as
there
are
atoms
of
12C
in
12g
of
the
12C
isotope.
=
Empirical formula
Atoms X Y
=
% mass
Moles
Simplest Ratio
then multiply EF by ^ to get
MF.
moles
Solid
moles
=
mass/Mr
volume
x
molarity
MOLE
Vol = m
3
Liquid
Gas
moles
=
vol.
x
PV=nRT
conc.
Temp = K
3
-3
Dm
Mol dm Pressure = N = moles
Pa

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Kg x 1000 g
% Error
kPa x 1000
Pa
Pipette
×100
cm3 x 10 -6
m3
25
Burette
×100
cm3 ÷ 1000 dm3
Thermometer
×100
dm3 -3
m3
x 10
Expected -
×100
°C +273 K error !
!"## !" !"#$%"! !"#$%&'
% ATOM ECONOMY = ×100
!"!#$ !"## !" !"" !"#$%#&%'
!"#$!% !"## !" !"#$%&'(
% YIELD = ×100
!!!"#!$%&'( !"## !" !"#$%&'(
Titration
Back
Titration
Balance
Equation
Write
+
balance
2
equations
Find
moles
of
substance
in
2nd
Mole
Ratio
equation
Find…read more

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EQUATIONS
Acid + alkali Salt + water
Acid + base Salt + water
Acid + carbonate Salt + water + CO2
Acid + metal Salt + hydrogen
HCl = hydrochloric acid
HNO3 = nitric acid
H2SO4 = sulfuric acid
H3PO4 = phosphoric acid…read more

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