Potassium Chloride + Oxygen
Guide to Stoich by Selena Granados
Assigned Reaction : KCl + O2
Balanced Equation: 2KCl(s) + 3O2(g) ------> 2KClO3(aq)
Molar Mass of each Reactant and Product:
KCl : 74.45 g/mol
O2: 31.98 g/mol
KClO3: 122.42 g/mol
What is Stoichiometry ?
Mole to Mole Conversion
Then the coefficient of KCl (2) over the coefficient of KClO3 (2)
Then Multiply across the top and Divide by the bottom,
You should end up with 1.17 Mole KClO3
Mass to Mass Conversions
74.45 KCl (Molar Mass of KCl) Over 1 Mole KCl
Coefficient of KClO3 Over the Coefficient of KCl
2 KClO3 over 2 KCl
1 Mole KClO3 over 122.42 g/mol KCl
Then Multiply across the top and then Divide by the Bottom.
You should end up with 19.89 g of KClO3
Limiting and Excess Reactant
Using 12,3 as our mass of bother reactants you just do a Mass to Mass Conversion of both of your reactants to find the mass of Product.
Theoretical Yield
My Excess Reactant was 12.3 g O2
My Limiting Reactant was 12.3g KCl
Percent Yield
Actual Yield Over Theoretical Yield
Multiply by 100
Percent Yield: 98%