Stoichiometry Review
If your given is in moles:
Determine the molar ratio to change from moles of
your original substance to moles of the desired
substance
If you want your answer in grams:
use the molar mass of the
desired substance to convert from moles back to
grams
If you want your
answer in moles: You are done!
If your given is in grams:
Use the molar mass of the compound to
determine the number of moles
Determine the molar ratio to change from moles of your original substance to moles
of the desired substance
If you want your
answer in moles: You are done!
If you want your answer in grams: use the molar
mass of the desired substance to convert
from moles back to grams
Moles to Moles: Given moles A x formula moles B
formula moles A Moles to Grams:
Given moles A x formula moles B x molar mass Bformula moles A 1 mole B
Grams to Moles:Given grams A x 1mole A x formula mol B
mol mass A formula mol A Grams to Grams:
Given grams A x 1mole A x formula mol B x mol mass B mol mass A formula mol A 1 mol B
Quick ‘cheat sheet’ If given A to find B
6 NaOH + 2 Al 2 Na3AlO3 + 3 H2
How many moles of aluminum are required to produce 4 moles of hydrogen?
6 NaOH + 2 Al 2 Na3AlO3 + 3 H2
How many moles of aluminum would produce 15g of H2?
6 NaOH + 2 Al 2 Na3AlO3 + 3 H2
How many grams of NaOH would be needed to form 6 moles of Na3AlO3
6 NaOH + 2 Al 2 Na3AlO3 + 3 H2
How many grams of Na3AlO3 would be formed from 350g of NaOH?
One question you have about making rockets using stoichiometry…
Question for Monday
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