Stoichiometry. The Study of Quantitative Relationships. What is Stoichiometry?.

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Stoichiometry

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Stoichiometry is the study of quantitative relationships between the amounts of reactants used and the amounts of products produced in a chemical reaction. Stoichiometry is based on the law of conservation of mass.

Using Stoichiometry

Start with a balanced equation for the chemical reaction!

Lead (II) sulfide reacts with oxygen gas to produce lead (II) oxide and sulfur dioxide.

1st Step: Balanced Equation

2PbS + 3O2 2PbO + 2SO2

Analyzing the Problem

QUESTION: If 0.60 mole of oxygen were consumed during a chemical reaction between oxygen and lead II sulfide how many GRAMSof lead (II) oxide would be produced?

Analyzing the Problem

PROBLEM: Determine the mass of one of the products when the moles of one reactant in a chemical reaction is known.

Use a BCA table to make this calculation easier.

Using Stoichiometry

Start with the balanced equation for the reaction!

Solid lead (II) sulfide reacts with oxygen gas to produce solid lead (II) oxide and sulfur dioxide gas.