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2.3 Vocabulary

Terms for chapter two section three: Modern Biology

QuestionAnswer
polar when a compound has a uneven distribution of charge.
hydrogen bond the force of attraction between a hydrogen moleule with a partial positive charge and another atom or molecule with a partial or full negative charge.
cohesion an attractive force that holds molecules of a single substance together.
adhesion the attracive force between two particles of different substances.
capillarity the attraction between molecules that results in the rise of the surface of a liquid when in contact with a solid.
solution a mixture in which one or more substances are uniformly distributed in another substance.
solute a substance dissolved in the solvent.
solvent the substance in which the solute is dissolved.
concentration the amount of solute dissolved in a fixed amount of the solution.
saturated solution a solution in which no more solute can dissolve.
aqueous solutions solutions in which water is the solvent.
hydroxide ion the OH- ion.
hydronium ion the H30+ ion.
acid when the number of hydronium ions in a solution is greater than the number of hydroxide ions.
base when the solution contains more hydroxide ions than hydronium ions.
pH scale a scale scientists developed for comparing the relative concentrations of hydronium ions and hydroxide ions in a solution.
buffers chemical substances that neutralize small amounts of either an acid or a base added to a solution.
Created by: DouglasI16
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