24 terms

Water chemistry

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H2O
The chemical formula for water
Polar
A molecule in which the positive and negative charges are separated
Hydrogen bonds
Weak attraction between a hydrogen atom of one molecule and a nitrogen, oxygen, or fluorine of another
Cohesion
Attraction between molecules of the same substance
Adhesion
An attraction between molecules of different substances
Surface tension
A measure of how difficult it is to stretch or break the surface of a liquid
Solute
A substance that is dissolved
Solvent
A substance that does the dissolving
Universal solvent
Water
Solution
A homogeneous mixture of two or more substances
Molecule
A group of atoms bonded together
Atom
The basic unit of matter
Hydrophilic
Having an affinity for water
Hydrophobic
Having an aversion to water
Acid
A substance with a pH less than 7
Base
A substance with a pH greater than 7
H+
Hydrogen ion
OH-
Hydroxide ion
Specific heat
The heat required to raise the temperature of one gram of a substance one degree centigrade
Electronegative
The tendency to attract electrons to form a chemical bond
Capillary action
The tendency of water to rise in a thin tube
Like dissolves like
Polar dissolves polar; non-polar dissolves non-polar
Hydration cell
The sphere of water molecules around dissolved ions
H3O+
Hydronium ion