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ch2.3
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17
Biology
9th Grade
10/12/2010

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Term
polar
Definition
describes a molecule with opposite charges on opposite ends
Term
hydrogen bond
Definition
the iner molecular force occurring when a hydrogen atom that is bonded to a highly electroegative atom of one molecule is attrcted to two unshared electrons of another molecule
Term
cohesion
Definition
the force that holds molecules of a single material together
Term
adhesion
Definition
the attractive force between two bodies of different substances that are in contact with each other
Term
capillarity
Definition
the attraction between molecules that results in the rise of a liqu in small tubes
Term
solution
Definition
a homogenous miture throughout which two or more substances are uniformly dispersed
Term
solute
Definition
ina solution th substanc that dissolvesin the solent
Term
solvent
Definition
 in a solution the subance in wich the solute dissolves
Term
concentration
Definition
the amount of a particular substance in a given quantity of a mixture, solution, or ore
Term
saturated solution
Definition
a solution that cannot dissolve any more solute nuder the given conditions
Term
aqueous solution
Definition
a solution in which water is the solvent
Term
hydroxide ion
Definition
the OH- ion
Term
hydronium ion
Definition
an ion consisting of a proton combined with a molecule of water
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 water
Term
pH scale
Definition
a range of values that are used to express the acidity or alkalinity
Term
buffer
Definition
a solution made from a week acid and its conjugate base that neutralizes small amounts of acids or bases added to it
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