Reactions Concepts
27 concepts · Grades 6-8, 9-12 · 33 prerequisite connections
This family view narrows the full chemistry map to one connected cluster. Read it from left to right: earlier nodes support later ones, and dense middle sections usually mark the concepts that hold the largest share of future work together.
Use the graph to plan review, then use the full concept list below to open precise pages for definitions, examples, formulas, and related mistake guides. That combination keeps the page useful for both human study flow and crawlable internal linking.
Concept Dependency Graph
Concepts flow left to right, from foundational to advanced. Hover to highlight connections. Click any concept to learn more.
Connected Families
Reactions concepts have 23 connections to other families.
All Reactions Concepts
Synthesis Reaction
A chemical reaction in which two or more simpler substances (elements or compounds) combine to form a single, more complex product.
Decomposition Reaction
A chemical reaction in which a single compound breaks down into two or more simpler substances (elements or simpler compounds), typically requiring an energy input.
Single Displacement
A chemical reaction in which a free (uncombined) element that is more reactive displaces and replaces a less reactive element within a compound, producing a.
Double Displacement
A double displacement (or metathesis) reaction occurs when two ionic compounds in solution exchange partners: AB + CD → AD + CB.
Combustion
A rapid exothermic chemical reaction in which a fuel reacts with oxygen gas, releasing large amounts of energy as heat and light.
Precipitation Reaction
A type of double displacement reaction in which two aqueous ionic solutions are mixed and the exchange of ions produces at least one insoluble ionic.
Net Ionic Equation
A simplified chemical equation that shows only the ions and molecules directly involved in a chemical reaction, with all spectator ions (those unchanged on both.
Oxidation Number
A number assigned to each atom in a compound using a set of rules, representing the hypothetical charge that atom would carry if all bonds.
Formula Writing
The systematic process of combining element symbols and numerical subscripts to represent the exact composition of a chemical compound, ensuring that the total positive charge.
Nomenclature
The systematic method for naming chemical compounds according to IUPAC (International Union of Pure and Applied Chemistry) rules, ensuring that every compound has exactly one.
Chemical Reaction
A process in which one or more substances (reactants) are transformed into entirely different substances (products) through the breaking and forming of chemical bonds, accompanied.
Reactant
A starting substance that is consumed and chemically transformed during a chemical reaction, appearing on the left side of a chemical equation before the reaction.
Product
A product is a substance that is formed as the result of a chemical reaction.
Chemical Equation
A written representation of a chemical reaction using chemical formulas for reactants and products, coefficients to indicate mole ratios, state symbols to show physical states.
Balancing Equations
The process of adjusting the coefficients (the numbers placed before chemical formulas) in a chemical equation so that the number of atoms of each element.
Conservation of Mass
A fundamental law stating that in any chemical reaction, the total mass of all reactants exactly equals the total mass of all products, because atoms.
Exothermic Reaction
A chemical reaction that releases energy (usually as heat or light) to the surroundings, resulting in an increase in surrounding temperature and a negative enthalpy.
Endothermic Reaction
A chemical reaction that absorbs energy (usually as heat) from the surroundings, resulting in a decrease in surrounding temperature and a positive enthalpy change ($\Delta.
Activation Energy
The minimum kinetic energy that reactant particles must possess upon collision in order to break existing bonds and initiate a chemical reaction, represented as the.
Catalyst
A substance that increases the rate of a chemical reaction by providing an alternative pathway with lower activation energy, without being permanently consumed or chemically.
Reaction Rate
The speed at which reactants are converted into products in a chemical reaction, quantified as the change in concentration of a reactant or product per.
Collision Theory
A model explaining that chemical reactions occur only when reactant particles collide with sufficient kinetic energy (at least equal to the activation energy) and in.
Oxidation
The loss of electrons by an atom, ion, or molecule during a chemical reaction, resulting in an increase in its oxidation state.
Reduction
The gain of electrons by an atom, ion, or molecule during a chemical reaction, resulting in a decrease in its oxidation state.
Redox Reaction
A chemical reaction in which electrons are transferred from one substance (the reducing agent, which is oxidized) to another (the oxidizing agent, which is reduced).
Equilibrium Constant
The ratio of product concentrations to reactant concentrations at equilibrium, each raised to its stoichiometric coefficient.
Enthalpy
A thermodynamic quantity representing the total heat content of a system at constant pressure, where the change in enthalpy ($\Delta H$) equals the heat absorbed.