CHEM 202 Chapter Notes - Chapter 14: Valence Bond Theory, Molecular Geometry, Chemical Polarity
a positive or negative whole number assigned to an element in a molecule or ion on the
basis of a set of
formal rules; to some degree it reflects that positive or negative character of the atom.
concentration
the quantity of solute present in a given quantity of
solvent or solution.
molarity
the concentration of a solution expressed as moles of
solute pre liter of solution (mol/L)
molality
the concentration of a solution expressed as the number
of moles of solute per kilogram of solvent (mol/kg)
normality
the concentration of a solution expressed as the gram
equivalent weight of a solute per liter of solution (g/L)
dilution
the process of preparing a less concentrated solution from a
more concentrated one by adding solvent.
titration
the process of reacting a solution of unknown
concentration with one of known concentration
molecular geometry
the arrangement in space of ATOMS in a molecule.
bond dipole
the dipole moment that is due to unequal electron
sharing between two atoms in a covalent bond.
equivalence point
the point in a titration at which the added solute reacts complete with the solute
12 10 8 6 4 2 0
present in the solution.
polar molecule
a molecule that possesses a nonzero dipole moment
nonpolar molecule
a molecule that possesses a zero dipole moment
valence bond theory
a model of chemical bonding in which an electron-pair bond is formed between two
atoms by the overlap of orbitals on the two atoms.
hybrid orbitals
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