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30 Cards in this Set

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  • Back
Polar Molecule
A molecule with opposite ends having opposite charges.
Cohesion
Collectively, when hydrogen bonds hold a substance together. "Sticks to itself"
Adhesion
The clinging of one substace to another.
Surface Tension
A measure of how difficult it is to stretch or break the surface of a liquid.
Kinetic Energy
The energy of motion. Anything that moves has this.
Heat
A measure of the total amount of kinetic energy due to molecular motion in a body of matter.
Temperature
Measure the total the intensity of heat due to the average kenetic energy of a molecule.
Calarie (cal)
The amount of heat it takes to raise the temperature of 1g of water by 1*C.
Kilocalorie (kcal)
The amount of heat it takes to raise the temperature of 1kg of water by 1*C.
Joule (J)
One of these equals 0.239 cal; one calorie equals 4.184 of these.
Specific Heat
The amount of heat that must be absorbed or lost for 1g of that substance to change it's temperature by 1*C
Heat of Evaporation
The quantity of heat a liquid must absorb for 1g of it to be converted from the liquid to the gaseous state.
Solution
A completely homogeneous mixture of two or more substances.
Solvent
A dissolving agent, or what disolves a substance.
Solute
A substance that is dissolved.
Aqueous Solution
A solution in which water is the solvent.
Hydration Shell
The sphere of water molecules around each disolved ion.
Hydrophilic
Water loving
Hydrophobic
Water fearing.
Colloid
A stable suspension of fine particles in a liquid.
Molecular Mass
The sum of the masses of all the atoms in a molecule.
Mole (mol)
Also called Avogadros number; represents an exact number of objects. 6.02 x 10 to the 23rd
Molarity
The number of moles of solute per liter of a solution.
Hydrogen Ion
During dissociation, a water molecule sometimes leaves it's electron behind, creating and ion with a single proton with a positive charge.
Hydroxide Ion
During dissociation, a water molecule sometimes leaves it's electron behind, leaving the remaining ion with a negative charge of -1.
Acid
A substance that increases the hydrogen ion concentration of a solution.
Base
A substance that decreases the hydrogen ion concentration of a solution.
pH
The negative logarithm (base 10) of the hydrogen ion concentration.
Buffers
Substances that minimize changes in the concentration of H+ and OH- in a solution.
Acid Precipitation
Rain, snow, or fog with a pH lower or more acidic than pH 5.6