GEN CHEM 1 | Stoichiometric Calculations

Stoichiometry

The study of the quantitative relationships between the reactants and products in a chemical reaction. The amount of each reactant p[resent determines how much a product can form.

Molar ratios

The coefficients in the formula are considered as the numbers in the molar ratio. These ratio can be written as conversion factors.

Solving the Required Number of Moles of One Substance (A) with the Number of Moles of Another Substance (B) (Mole to Mole)

Moles of Substance A (mol A) = [Moles of Substance B (mol B)] x [(Coefficient of Substance A (mol A))/(Coefficient of Substance B (mol B))]

Solving the Required Mass of One Substance (A) with the Number of Moles of Another Substance (B)

Mass of Substance A (g A) = [Moles of Substance B (mol B)] x [(Coefficient of Substance A (mol A))/(Coefficient of Substance B (mol B))] x [molar mass of Substance A (g A/mol A)]

Solving the Required Number of Moles of One Substance (A) with the Mass of Another Substance (B)

Moles of Substance A (mol A) = [Mass of Substance B (g B)]/[molar mass of Substance B (g B/mol B)] x [(Coefficient of Substance A (mol A))/(Coefficient of Substance B (mol B))]

Solving the Required Mass of One Substance (A) with the Mass of Another Substance (B)

Mass of Substance A (g A) = [Mass of Substance B (g B)]/[molar mass of Substance B (g B/mol B)] x [(Coefficient of Substance A (mol A))/(Coefficient of Substance B (mol B))] x [molar mass of Substance A (g A/mol A)]