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Bonds and Solutions
For a test at James Island
26
Chemistry
12th Grade
05/05/2010

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Term
Electronegativity
Definition
a chemical property that describes the ability of an atom (or, more rarely, a functional group) to attract electrons (or electron density) towards itself
Term
Shielding Effect
Definition
electrons in filled orbitals that shield the outer shell electrons somewhat from effects of protons.
Term
Polar covalent bond
Definition
the bonding electrons will spend a greater amount of time around the atom that has the stronger affinity for electrons.
Term
Non-polar covalent bond
Definition
bonding electrons that are covalent, shared by adjacent electrons, and are shared equally.
Term
Electrolyte
Definition
any substance containing free ions that make the substance electrically conductive
Term
Polar molecule
Definition

A molecule in which there is some separation of charge in the chemical bonds

Term
Non-polar molecule
Definition
a molecule where there is no separation of charge in the chemical bonds
Term
Interparticle attraction
Definition

are broken when a compound boils from a liquid to a gas.

Term
Miscible
Definition
the property of liquids to mix in all proportions, forming a homogeneous solution
Term
Hydrogen bonding
Definition
the attractive interaction of a hydrogen atom with an electronegative atom, like nitrogen, oxygen or fluorine (thus the name "hydrogen bond", which must not be confused with a covalent bond to hydrogen
Term
Surface tension
Definition
what causes the surface portion of a liquid to be attracted to another surface
Term
Capillarity
Definition

a phenomenon caused by surface tension and resulting in the distortion, elevation, or depression of the surface of a liquid in contact with a solid

Term
Solute
Definition
the substance dissolved in another substance.
Term
Solvent
Definition
a liquid in which substances are dissolved forming a solution
Term
Solvation
Definition

the process of attraction and association to the molecules of a solvent

Term
Solubility
Definition
the property of a solid, liquid, or gaseous chemical substance that is called solute to dissolve in a liquid solvent to form a homogeneous solution
Term
Dissociation
Definition
a general process in which ionic compounds (complexes, or salts) separate or split into smaller particles, ions, or radicals, usually in a reversible manner
Term
Hard water
Definition
Water that has a high mineral content
Term
Saturated
Definition
the point at which a solution of a substance can dissolve no more of that substance and additional amounts of it will appear as a precipitate
Term
Unsaturated
Definition
When referring to solutions, being able to dissolve more solute. When referring to organic compounds, containing double or triple carbon-carbon bonds.
Term
Supersaturated
Definition
a solution that contains more of the dissolved material than could be dissolved by the solvent under normal circumstances
Term
Golden rule of dissolving
Definition
The rule of dissolving where everything gold has to be measured.
Term
Soap molecule
Definition
have one side that is hydrophilic and one side that is hydrophobic which allows it to bond with, and dissolve in, both water and oils
Term
Molarity
Definition
the number of moles in solute dissolved in one liter of solution
Term
% solution
Definition
parts of solute per 100 total parts of solution
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