Name: _________________________________
flip-chart guy on stoichiometry
A list of common stoichiometry problems:
(ratio)
Moles to moles
(simple - one step)
(division)
(multiplication)
Grams to moles
moles to grams
Particles to moles
moles to particles
Liters to moles
moles to liters
Energy to moles
moles to Energy
(complex- many steps)
Grams to moles to moles to grams
liters to moles to moles to liters
Grams to moles to moles to particles
liters to moles to moles to particles
Grams to moles to moles to liters
liters to moles to moles to grams
Grams to moles to energy
liters to moles to energy
particles to moles to moles to particles
particles to moles to moles to grams
particles to moles to moles to liters
particles to moles to energy
Name: _________________________________
flip-chart guy on stoichiometry
Details of how to solve problems:
Is the equation set up and balanced? No, then do it. Yes, then
Start at the left and identify what the problem has given.
Then go to the right and find the wanted.
Set up the problem.
Do the calculations.
GIVEN
is it in?
1. grams
2.grams
3.grams
4.particles
5.particles
6.particles
7.liters
8.liters
9.liters
DIVIDE
by molar mass
by molar mass
by molar mass
by Avogadro’s #
by Avogadro’s #
by Avogadro’s #
by 22.4 liters per mole
by 22.4 liters per mole
by 22.4 liters per mole
MOLES
(given)
to get moles
to get moles
to get moles
to get moles
to get moles
to get moles
to get moles
to get moles
to get moles
use RATIO (wanted/given)
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
convert given moles to wanted moles
MOLES
(wanted)
moles
moles
moles
moles
moles
moles
moles
moles
moles
MULTIPLYING moles (w)
by molar mass
by Avogadro’s #
by 22.4 liters per mole
by Avogadro’s #
by molar mass
by 22.4 liters per mole
by 22.4 liters per mole
by Avogadro’s #
by molar mass
To get
WANTED
grams
particles
liters
particles
grams
liters
liters
particles
grams
Name: _________________________________
flip-chart guy on stoichiometry
5 H2O2 + 2 KMnO4 + 3 H2SO4 → 2 MnSO4 + 1 K2SO4 + 8 H2O + 5 O2 + 418 KJ
1. How many liters of oxygen gas at STP can be produced from 4.92 grams of H2SO4?
2. How many grams of H2O2 are required to produce 8.2 x 1022 molecules of water?
3. How many KJ of Energy are released if 43.7 grams of H2SO4 are consumed?
4. How many molecules of H2O2 must be consumed to release 655 KJ of Energy?
5. How many molecules of O2 are produced if 3.9 x 10 24 molecules of H2SO4 are produced?
Name: _________________________________
flip-chart guy on stoichiometry
5 H2O2 + 2 KMnO4 + 3 H2SO4 → 2 MnSO4 + 1 K2SO4 + 8 H2O + 5 O2 + 418 KJ
6. How many liters of O2 at STP must be produced in order to produce 9.26 grams of K2SO4?
1 N2 + 3 H2 → 2 NH3
7. How many liters of NH3 gas at STP can be produced if 8.16 liters of H2 gas are consumed?
8. If you have 12 grams of N2 and 3 grams of H2, which is the limiting reactant? (not flip-chart guy)