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Ch.3 - Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Empirical Formula
Molecular Formula
Combustion Analysis
Combustion Apparatus
Polyatomic Ions
Naming Ionic Compounds
Writing Ionic Compounds
Naming Ionic Hydrates
Naming Acids
Naming Molecular Compounds
Balancing Chemical Equations
Limiting Reagent
Percent Yield
Mass Percent
Functional Groups in Chemistry
Additional Guides
Theoretical Yield (IGNORE)
Balancing Chemical Equations Worksheet (IGNORE)
Limiting Reactant (IGNORE)

The Limiting Reagent represents the compound that is totally consumed in the reaction. 

Limiting Reagent & Theoretical Yield

Concept #1: Limiting Reagent

Concept #2: Limiting Reagent Stoichiometric Chart

Example #1: Chromium (III) oxide reacts with hydrogen sulfide (H2S) gas to form chromium (III) sulfide and water:

Cr2O3 (s) + 3 H2S (g) → Cr2S3 (s) + 3 H2O (l)

What is the mass of chromium (III) sulfide formed when 14.20 g Cr2O3 reacts with 12.80 g H2S?

Practice: Acrylonitrile (C­3H3N) is the starting material for many synthetic carpets and fabrics. It is produced by the following reaction: 

2 C3H6 (g) + 2 NH3 (g) + 3 O2 (g)  → 2 C3H3N (g) + 6 H2O (g)

If 12.0 g C3H6, 10.0 g NH­3, and 5.0 g O2 react, what mass of acrylonitrile can be produced, assuming 100% yield?

Practice: The reaction between solid aluminum and iron (III) chloride can generate temperatures reaching 3000 ºC and is used in welding metals. 

2 Al + Fe2O3 → Al2O­3 + 2 Fe

If 150 g of Al are reacted with 432 g of Fe­2O3, what is the mass of the excess reactant remaining?