Unit 6B: Review and Reinforcement (Stoichiometry)

The study of quantitative relationships between the amounts of reactants used and the amounts of products formed by a chemical reaction is called stoichiometry.

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You can determine the number of moles of a product produced in a reaction if you know the number of moles of at least two reactants.

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The mole ratio of H₂ to O₂ in the equation 2H₂ + O₂ → 2H₂O is 2:2.

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The total mass of the reactants is equal to the total mass of the products in a chemical reaction.

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Mole-Mole problems involve conversions from moles of one substance to grams of another.

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The coefficients in a chemical equation represent not only the number of molecules or particles of each substance, but also the number of moles of each substance.

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The major types of stoichiometry problems are mole-mole, mass-mass, mass-volume and volume-volume.

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In solving a mass-mass problem, it is necessary to convert the given mass to volume.

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When the mass of a reactant is given, the number of moles can be found by dividing the mass by the reactant's molar mass.

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The molar volume of any gas at STP is 6.02 × 10²³ L.

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