UPCAT Chemistry — Stoichiometry & Chemical ReactionsConcept Map
UPCAT candidates who build concept maps early in review tend to retain Stoichiometry & Chemical Reactions better through the long stretch to exam day. The Stoichiometry & Chemical Reactions concept map on this page shows the sub-topics University of the Philippines includes most often in UPCAT Chemistry, and how they branch off the central idea.
Exam context
The University of the Philippines College Admission Test is conducted by University of the Philippines and is scheduled for Mid-2026 (announced by UP Admissions). The Chemistry subtest is marked as "Core" in the official pattern, and Stoichiometry & Chemical Reactions appears in position 4th of 7 in the UPCAT Chemistry review rotation. Passing mark: UPG ≤ 2.2 typical. Recent UPCAT 2026 papers have drawn roughly 20 questions from this subject.
Stoichiometry & Chemical Reactions - Concept map
Central Concept
Stoichiometry and Chemical Reactions
Related Concepts
Concept
Chemical Reactions
Sub Concepts
- Types of Reactions (Synthesis, Decomposition, Single/Double Replacement, Combustion, Acid-Base)
- Balanced Chemical Equations
- Law of Conservation of Mass
- Reactants and Products
- Chemical Equation Components
Relationship To Central
Provides the foundation for stoichiometric calculations
Concept
The Mole Concept
Sub Concepts
- Avogadro's Number (6.022 × 10²³)
- Molar Mass
- Molecular Mass
- Formula Mass
- Mass-Mole-Number Relationships
Relationship To Central
Essential unit for quantitative chemical calculations
Concept
Chemical Calculations
Sub Concepts
- Percent Composition
- Empirical Formula
- Molecular Formula
- Mass-to-Mole Conversions
- Mole-to-Mass Conversions
Relationship To Central
Core application of stoichiometric principles
Concept
Solution Chemistry
Sub Concepts
- Molarity (M)
- Molality (m)
- Dilution Calculations
- Solution Stoichiometry
- Concentration Relationships
Relationship To Central
Applies stoichiometry to solutions and concentrations
Concept
Reaction Stoichiometry
Sub Concepts
- Limiting Reactant
- Excess Reactant
- Theoretical Yield
- Actual Yield
- Percent Yield
Relationship To Central
Uses balanced equations to predict reaction quantities
Concept
Thermochemistry
Sub Concepts
- First Law of Thermodynamics
- Conservation of Energy
- Heat Transfer in Reactions
- Endothermic and Exothermic Processes
Relationship To Central
Relates energy changes to chemical reactions
Concept Connections
To
Stoichiometric Calculations
From
Balanced Chemical Equations
Strength
strong
Relationship
provides mole ratios for quantitative calculations
To
All Stoichiometric Calculations
From
Mole Concept
Strength
strong
Relationship
serves as the fundamental unit for chemical quantities
To
Balanced Equations
From
Law of Conservation of Mass
Strength
strong
Relationship
requires equal mass and atoms on both sides
To
Theoretical Yield
From
Limiting Reactant
Strength
strong
Relationship
determines the maximum amount of product possible
To
Molecular Formula
From
Empirical Formula
Strength
strong
Relationship
provides the simplest ratio needed to find true formula
To
Solution Stoichiometry
From
Molarity
Strength
moderate
Relationship
enables calculations involving solutions and concentrations
To
Empirical Formula
From
Percent Composition
Strength
moderate
Relationship
provides mass data needed to determine simplest formula
To
Chemical Reactions
From
Thermochemistry
Strength
moderate
Relationship
describes energy changes accompanying reactions
To
Percent Yield
From
Actual Yield
Strength
strong
Relationship
actual results compared to theoretical predictions
To
Mole Conversions
From
Avogadro's Number
Strength
strong
Relationship
conversion factor between moles and particles
Previous chapter
Periodic Table, Bonding & Chemical Language
Next chapter
Molecular Theory — VSEPR, IMFA & KMT
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