Stoichiometric Conversion Map
Stoichiometric Conversion Map
Volume Liters A Liters B
of a solid liquid
or gas
Mass g A g B
# Particles #Atoms or #Atoms or
Molecules A Molecules B
Volume (aq) Liters of solution (A) Liters of solution (B)
Of an aqueous
solution
containing A
Quantity moles A moles B
HOW TO USE THIS MAP
1st Have a balanced chemical equation!!
2nd Have a periodic table
3rd USE IT LIKE THIS
If you have any quantity for any one chemical involved in a chemical reaction you can determine the quantities of all the other chemical species that will be involved in that reaction. The chemical that you have a quantity of is always chemical (A) on this map. The chemical that you want to calculate a quantity for is always chemical (B). Begin with the appropriate measure on the left, (A) side of the map and using your given quantity follow the mathematical steps to calculate the quantity you wish to determine on the right, (B) side!
Example: Given a 10.0g sample of Lithium used it in the following reaction, calculate the volume of H2(g) produced.
2Li(s) + 2H2O(l) ( 2LiOH(s) + H2(g)
❖ Lithium is the chemical that we have a known quantity for, so we will use it as our reference chemical (A).
❖ Since it is the mass of Li we are given, that is the place on the map to begin our calculations.
❖ H2(g) is the chemical product that we wish to find out about so we will use it as or target chemical (B).
❖ Since it is the volume of H2(g) we are asked to determine that is our final destination on the map.
Volume Liters B
Mass g A g B
Quantity moles A moles B
10.0g Li 1mole Li 1mole H2 2.016g H2 1liter H2
6.943g Li 2 moles Li 1 mole H2 0.085g H2
-----------------------
Divide by the molar mass of A
( (g/mol)
Divide by Avagadro’s Constant
( (6.022E23parts/mol)
Multiply by Molarity (M) of solution
x (moles / Liter)
Multiply by the molar mass of B
x (g/mol)
Multiply by Avagadro’s Constant
x (6.022E23parts/mol)
Divide by Molarity (M) of solution
( (moles / Liter)
Multiply by the Density of A
x (g / liter)
Divide by the Density of B
( (g / liter)
Multiply by the mole ratio
x (mol B / mol A)
Divide by the molar mass of A
Multiply by the mole ratio
Multiply by the molar mass of A
Divide by the Density of B
Y
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