A Guide to Stoich
Jordyn Galvan 5th Period Miller Chemistry PreAp
Vocabulary That You Need To Know:
One mole contains 6.022 x 1023 things (atoms, molecules, ions etc).
What is Stoichiometry?
the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers.
What is a Coefficient?
Coefficients are the numbers placed before the reactants in a chemical equation so that the number of atoms in the products on the right side of the equation are equal to the number of atoms in the reactants on the left side.
What is a conversion factor?
A ratio of coefficients found in a balanced reaction, which can be used to inter-convert the amount of products and reactants.
Example: Hydrochloric Acid and Calcium Hydroxide- Double Replacement
H2Cl + Ca(OH)2----> CaCl2 + H20
Balanced Equation: 2HCl+ Ca (OH)2 ----> CaCl2 + H2O
IPUAC name for each reactant and product:
Conversions: mole to mole, mass to mass, limiting and excess reactant, theoretical yield, percent yield
10.19m Hcl * 1 CaCl2 / 2 HCl = 5.095
Mass to Mass:
12.1*1HCl*2H2O *2.016g/ 110.98/2HCl/1m + 3.44
Limiting Excess Reactant:
12.3g HCl* 1 *1 *110.98/36.461/2/1 = 74.88
Percent Yield: 2.1g/ 3.44 *100 = 61.046