Transcript Mole Island Diagram Notes Part 3

Mole Island Diagram
How Big is a Mole?
One mole of marbles would cover the entire Earth
(oceans included) for a depth of two miles.
One mole of $1 bills stacked
one on top of another would
reach from the Sun to Pluto
and back 7.5 million times.
It would take light 9500 years to travel from the bottom
to the top of a stack of 1 mole of $1 bills.
Amedeo
Avogadro
?
quadrillions
thousands
trillions
billions
millions
1 mole = 602213673600000000000000
or 6.022 x 1023
Welcome to Mole Island
1 mol = molar mass
1 mole = 22.4 L
@ STP
1 mol =
6.02 x 1023 particles
Stoichiometry Island Diagram
Known
Unknown
Substance A
Substance B
M
Mass
Mass Mountain
Mass
Mole Island
Liter Lagoon
V
Volume
Mole
Mole
Volume
Particles
Particles
P
Particle Place
Stoichiometry Island Diagram
Stoichiometry Mole Island Diagram
When in doubt…convert to moles!
Mass
Volume
Known
Unknown
Substance A
Substance B
1 mole = 22.4 L @ STP
Mass
Use coefficients
from balanced
chemical equation
Mole
Mole
1 mole = 22.4 L @ STP
Volume
(gases)
(gases)
Particles
Particles
Stoichiometry Island Diagram
Known
Unknown
Substance A
Substance B
M
Mass
Mass Mountain
Mass
Liter Lagoon
V
Volume
Mole
Mole
Volume
Particles
Particles
P
Particle Place
Stoichiometry Island Diagram
Mass, Volume, Mole Relationship
A. Using Mole Island
Just watch, don’t write: If you have 79.1 g of Zn to react
with excess HCl (enough HCl to keep reacting as long as
you need), how many Liters of H2 gas will be produced?
Zn + 2HCl 
79.1 g
79.1
g Zn
1 mol
Zn
65.39
g Zn
ZnCl2 + H2
?L
1 mol
H2
22.4 L
H2
1 mol
Zn
1 mol
H2
= 27.1 L
H2
B. Using Mole Island
Now write this one for practice: If you instead have 79.1 g
of HCl to react with excess Zinc (enough Zinc to keep
reacting as long as you need), how many Liters of H2 gas
will be produced?
Zn + 2HCl 
79.1 g
79.1g
HCl
1 mol
HCl
36.5g
HCl
ZnCl2 + H2
?L
1 mol
H2
22.4 L
H2
2 mol
HCl
1 mol
H2
= 24.3 L
H2
Other possibilities: Still starting with 79.1 grams of HCl,
how many molecules of H2 gas are produced? Or what
mass of H2 gas is produced?
How would these questions change your calculations?
Zn + 2HCl 
79.1 g
ZnCl2 + H2
Same conversion to moles, same mole to mole
ratio, different last conversions…
79.1
g HCl
1 mol
HCl
36.5
g Zn
? mc
Or ? g
1 mol 6.02 x 1023
H2
mc H2
= 6.5 x 1023
mc H2
2 mol
1 mol
HCl
H2
= 2.17 g H2