Chemical Equation
| Formula / Notation | aA + bB → cC + dD (balanced; law of conservation of mass) |
|---|---|
| Also Known As | Reaction equation, balanced equation, molecular equation, net ionic equation |
What is Chemical Equation?
A chemical equation is a symbolic representation of a chemical reaction showing the reactants on the left and products on the right, separated by an arrow. Balanced chemical equations obey the law of conservation of mass: the number of each type of atom is equal on both sides. Equations may also show state symbols (s, l, g, aq) and enthalpy changes.
Formula & Notation
Other Names / Synonyms: Reaction equation, balanced equation, molecular equation, net ionic equation
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A chemical equation is a symbolic representation of a chemical reaction showing the reactants on the left and products on the right, separated by an arrow. Balanced chemical equations obey the law of conservation of mass: the number of each type of atom is equal on both sides. Equations may also show state symbols (s, l, g, aq) and enthalpy changes.
Chemical equations are used to calculate stoichiometric quantities for laboratory reactions and industrial processes, to determine limiting reagents, to compute theoretical yields, and to describe nuclear reactions, ionic equilibria, and biochemical pathways.
Chemical equations must be correct and balanced before scaling up reactions. An unbalanced or incorrect equation can lead to wrong reagent quantities, unexpected products, or hazardous conditions (e.g., generating toxic gases or explosive mixtures).
The formula or notation for Chemical Equation is: aA + bB → cC + dD (balanced; law of conservation of mass)