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Biology Campbell Reece Eighth Edition Ch. 3 Flashcards

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105788448polar moleculemolecule with unequal distribution of electrons0
105788449cohesionEquivalent to surface tension; the forces that cause the individual molecules to be attracted to each other and thus cohese; usually caused by polarity1
105788450adhesionthe clinging of one substance to another; equivalent to capillary action2
105845688surface tensiona measure of how difficult it is to stretch or break the surface of a liquid3
105845689kinetic energythe energy of motion4
105845690heatthe total kinetic energy of a group of atomic particles5
105845691temperaturethe average kinetic energy of a group of atomic particles6
105845692Celsius scalethe scale used to indicate temperature. Equals Kelvin -273.157
105845693caloriethe amount of heat it takes to raise the temperature of 1 g of water by 1 degree Celsius. = 4.184 Joules8
105845694Calorie1000 calories9
105845695jouleunit of energy most commonly used10
105845696specific heatthe amount of heat that must be absorbed or lost for 1 g of that substance to change its temperature by 1 degree C11
105845697evaporative coolingwhen a liquid evaporates, the remaining liquid remains cooler due to the loss of the particles with the most energy, the property of a liquid whereby the surface becomes cooler during evaporation, owing to a loss of highly kinetic molecules to the gaseous state.12
105845698solutiona liquid that is a completely homogeneous mixture of two or more substances13
105845699solventdissolving agent of a solution14
105845700solutesubstance that is dissolved in a solution15
105845701hydration shellthe sphere of water molecules that encompass each dissolved ion in a solution16
105845702hydrophilicinteracting readily with water; typical of polar compounds or those containing charged or electronegative atoms, type of molecule that interacts with water by dissolving in water and/or forming hydrogen bonds with water molecules17
105845703aqueous solutiona solution in which water is the solvent18
105845704colloida stable suspension of fine particles in a liquid19
105845705hydrophobicdescribes substances that are nonpolar and seem to repel water20
105845706molecular massthe sum of the masses of all the atoms in a molecule21
105845707moleabbreviated (mol). Equivalent to (6.02214179 × 10^23) particles. A count of the number of particles in a given specimen22
105845708Avogrado's Number(6.02214179 × 10^23) particles / mol23
105845709Molaritythe number of moles of solute per liter of solution24
105845710hydrogen iona single proton with a charge of 1+ (H+)25
105845711hydroxide ionwater molecule that lost a proton H2O--> OH-26
105845712hydronium ionH3O+. May actually be 3 water molecules converged around one hydrogen ion. Often represented as H+27
105845713AcidUsually increases the hydrogen ion concentration of a solution. Acts as a proton donater28
105845714BaseUsually increases the hydroxide ion concentration in a solution and reduces Hydrogen ion concentration in a solution. Acts as a proton acceptor.29
105845715pHthe negative logarithm(base 10) of the hydrogen ion concentration. pH = -log[H+]30
105845716Buffersubstance that minimizes changes in the concentrations of H+ and OH- ions in a solution. Usually contains a weak acid and its corresponding base, such that they dissociate and recombine readily with other acids/bases that appear in solution31
105845717Acid precipitationrain, snow, or fog with a pH lower than pH 5.232

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