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Bio- Ch. 2

Energy The capacity to do work
Chemical Reaction The process by which one or more substances change to produce one or more different substances
Reactant A substance or molecule that participates in a chemical reaction
Product A substance that forms in a chemical reaction
Activation Energy The minimum amount of energy required to start a chemical reaction
Catalyst A substance that changes the rate of a chemical reaction without being consumed or changed significantly
Enzyme The type of protein or RNA molecule that speeds up metabolic reactions in plants and animals without being permanently changed or destroyed
Polar Describes a molecule with opposite charges on opposite ends
`Hydrogen Bond The intermoleculer force occurring when a hydrogen atom that is bonded to a highly electronegative atom of one molecule is attracted to two unshared electrons of another molecule
Cohesion A force that holds molecules of a single material together
Adhesion The attractive force between two bodies of different substances that are in contact with each other
Capillarity The attraction between molecules that results in a rise of a liquid in small tubes
Solution A homogeneous mixture throughout which two or more substances are uniformly dispersed
Solute In a solution, the substance in which the solute dissolves
Buffer A solution made from a weak acid and its conjugate base that neutralizes small amounts of acids or bases added to it
Concentration The amount of a particular substance in a given quantity of a mixture, solution, or ore
Solvent In a solution, the substance in which the solute dissolves
Hydroxide ion The OH- ion
Hydronium ion (Hydrogen ion) An ion consisting of a proton combined with a molecule of water
PH Scale A range of values that are used to express the acidity or alkalinity (basicity)
Acid Any compound that increases the number of hydronium ions when dissolved in water
Base Any compound that increases the number of hydroxide ions when dissolved in water
Created by: archergirl