Reversible and irreversible reactions in chemistry, including the concept of equilibrium.
Reversible reactions in chemistry can proceed in both forward and reverse directions. Reactants can turn into products, and these products can transform back into reactants until reaching a state of equilibrium.
When a reaction evolves a gas, forms a precipitate, or generates a large amount of heat or light, it is considered irreversible. Most reactions are slow in the reverse direction, leading to the classification of irreversible reactions in practice.
Equilibrium constant expressions can be used for readily reversible reactions, where reactants and products can interchange based on a simple set of rules.
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