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ch 2 section 3 DC
ch 2 section 3 DC
17
Biology
10th Grade
09/10/2012

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Term
polar
Definition
describes a molecule with opposite charges on opposite ends.
Term
hydrogen bond
Definition
the force of attraction between a hydrogen molecule with a partial positive charge and another atom or molecule
Term
cohesion
Definition
an attractive force that holds molecules of a single substance together.
Term
adhesion
Definition
an attractive force between two particles of different substances.
Term
capillarity
Definition
the attraction between molecules that results in the rise of the surface of a liquid when in contact with a solid.
Term
solution
Definition
a mixture in which one or more substances are uniformly distributed in another substance.
Term
solute
Definition
a substance dissolved in the solvent.
Term
solvent
Definition
a substance in which the solute is dissolved.
Term
concentration
Definition
the amount of solute dissolved in a fixed amount of the solution.
Term
saturated solution
Definition
a solution in which no more solute can dissolve.
Term
aqueous solution
Definition
solution in which water is the solvent.
Term
hydroxide ion
Definition
the OH- ion.
Term
hydronium ion
Definition
the H3O+ ion.
Term
acid
Definition
any compound that increases the number of hydronium ions when dissolved in water.
Term
base
Definition
any compound that increases the number of hydroxide ions when dissolved in wate.
Term
pH scale
Definition
a scale used for comparing the relative concentrations of hydronium ions and hydroxide ions.
Term
buffer
Definition
chemical substances that neutralize small amounts of either an acid or a base added to a solution.
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