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2.3 Biology

chapter 2

polar describes a molecule in which the positive and negative charges are separated
hydrogen bond the intermolecular force occurring when a hydrogen atom that is bonded to a highly electronegative atom of 1 molecule is attracted to 2 unshared electrons of another molecule
cohesion a force that holds molecules of a single material together
adhesion the attraction force between 2 bodies of different substances that are in contact with each other
capillarity the attraction between molecules that results in the rise of a liquid in small tubes
solution a homogeneous mixture throughout which 2 or more substances are uniformly dispersed
solute in a solution, the substances that dissolves in the solvent
solvent in a solution, the substance in which the solute dissolves
concentration the amount of a particular substance in a given quantity of a mixture, solution, or ore
saturated solution a solution that cannot dissolve any more solute under the given conditions
aqueous solution a solution in which water is the solvent
hydroxide ion the OH ion
hydronium ion an ion existing of a proton combined with a molecule of water; H30+
acid any compound that increases the number of hydronium ions when dissolved in water; acids turn blue litmus paper red and react with bases and some metals to form salts
base ant compound that increases the number of hydroxide ions when dissolved in water; bases turn red litmus paper blue and react with acids to form salts
pH scale a value that is used to express the acidity or alkalinity of a system; each whole number on the scale indicates a tenfold change in acidity. A PH of 7 is neutral, less than 7 is acidic, greater than 7 is basic
buffer a solution made from weak acid and its conjugate base that neutralizes small amounts of acids or bases added
Created by: ChambersA20



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