Vapor-pressure lowering
The decrease in the vapor pressure of a liquid caused by the presence of dissolved solute; a
colligative property. See Raoult’s law.
Voltaic cell
See Galvanic cell.
VSEPR theory
Stands for valence shell electron-pair repulsion theory. It predicts/explains the geometry of
molecules in terms of the repulsion that electron pairs have that cause them to be as far apart as
possible from one another.
Water dissociation constant (Kw)
The equilibrium constant of the water dissociation reaction at a given temperature; 1.00 × 10–14 at
25.00°C.
Weak acid
An acid that undergoes partial dissociation in an aqueous solution; e.g., CH 3 COOH.
Weak base
A base that undergoes partial dissociation in an aqueous solution; e.g., NH 4 OH.
Yield
The amount of product obtained from a reaction.
Z
Nuclear charge. Equivalent to atomic number.