"Chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei."
There are various types of chemical reactions like synthesis, decomposition, single replacement, double replacement, and combustion reactions etc.
Chemical Equations: The representation of the reactants and products in a chemical reaction as symbols and formulas.
Balancing Chemical Equations: The process of adjusting coefficients to ensure that the number of atoms in the reactants is equal to the number of atoms in the products.
Classification of Chemical Reactions: The different types of chemical reactions including synthesis, decomposition, single replacement, double replacement, combustion, and acid-base.
Synthesis Reactions: The combination of two or more substances to form a more complex substance.
Decomposition Reactions: The breakdown of a substance into two or more simpler substances.
Single Replacement Reactions: A reaction in which an element replaces another element in a compound.
Double Replacement Reactions: A reaction in which two compounds exchange ions to form two new compounds.
Combustion Reactions: A reaction in which a substance reacts with oxygen to produce heat and light.
Acid-Base Reactions: A reaction in which an acid reacts with a base to produce a salt and water.
Redox Reactions: A reaction in which there is a transfer of electrons between two substances.
Oxidation and Reduction: The increase or decrease in the oxidation state of an atom during a redox reaction.
Reaction Stoichiometry: The quantitative relationship between reactants and products in a chemical reaction.
Limiting and Excess Reactants: The reactant that is completely consumed in a reaction and the reactant that is not completely consumed, respectively.
Reaction Rates: The speed at which a reaction occurs.
Reaction Mechanisms: The steps involved in a complex reaction.
Catalysts: Substances that increase the rate of a reaction without being consumed.
Enthalpy and Entropy: The energy transfer and disorder, respectively, that occur during a chemical reaction.
Equilibrium: The point at which the forward and reverse reactions occur at the same rate.
Combination or synthesis reaction: A reaction where two or more elements or compounds combine to form a single product.
Decomposition reaction: A reaction where a single compound breaks down into two or more simpler products.
Combustion reaction: A reaction where a substance reacts with oxygen to produce heat and light.
Single displacement reaction: A reaction where an element reacts with a compound to form a new element and a new compound.
Double displacement reaction: A reaction where two compounds exchange ions to form two new compounds.
Acid-base reaction: A reaction where an acid and a base react to form water and a salt.
Redox or oxidation-reduction reaction: A reaction where electron transfer takes place, resulting in the oxidation of one substance and the reduction of another.
Precipitation reaction: A reaction where two solutions react to form an insoluble solid called a precipitate.
Photochemical reaction: A reaction in which light energy is used to initiate or carry out the reaction.
Electrolysis: A reaction where an electric current is used to break down a substance into its constituent elements.
"Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur."
"The substance (or substances) initially involved in a chemical reaction are called reactants or reagents."
"Chemical reactions yield one or more products, which usually have properties different from the reactants."
"Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism."
"Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions."
"Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms."
"A reaction may be classified as redox in which oxidation and reduction occur or non-redox in which there is no oxidation and reduction occurring."
"Most simple redox reactions may be classified as a combination, decomposition, or single displacement reaction."
"Different chemical reactions are used during chemical synthesis in order to obtain the desired product."
"In biochemistry, a consecutive series of chemical reactions form metabolic pathways, where the product of one reaction is the reactant of the next reaction."
"These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions."
"Metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperature and concentrations present within a cell."
"The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles."
"Nuclear chemistry involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes can occur."
"Chemical equations symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions."
"Chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei."
"Reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms."
"A reaction may be classified as redox in which oxidation and reduction occur or non-redox in which there is no oxidation and reduction occurring."
"Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism."