👉 A reaction fluid, also known as a reaction medium or solvent, is a substance that facilitates chemical reactions by dissolving reactants and providing an environment conducive to the reaction's progression. It can be a liquid, gas, or solid, and its primary role is to dissolve reactants, allowing them to interact more effectively. Reaction fluids can also influence reaction rates and selectivity by affecting the solubility, stability, and mobility of reactants and products. Common examples include water, organic solvents like ethanol or acetone, and ionic liquids, each chosen based on the specific requirements of the chemical process they support.