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A substance that conducts electricity well in a dilute aqueous solution.

 

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Ionic Compounds

Compounds containing predominantly ionic bonding.

Standard Molar Enthalphy of Formation

The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

Heterogeneous Catalyst

A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.

Isomers

Different substances that have the same formula.

Isotopes

Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

Active Metal

Metal with low ionization energy that loses electrons readily to form cations.

Carbanion

An organic ion carrying a negative charge on a carbon atom.

Alkaline Battery

A dry cell in which the electrolyte contains KOH.

Solution

Homogeneous mixture of two or more substances.

Alums

Hydrated sulfates of the general formula M+M3+(SO4)2.12H2).

Saccharic acid

A white, needlelike, crystalline, water-soluble solid or syrup, C6H10O8, usually made by the oxidation of cane sugar, glucose, or starch by nitric acid. Also called "Glucaric acid."

Frequency

The number of repeating corresponding points on a wave that pass a given observation point per unit time.

yttrium metal

Any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Hydrogen Bond

A fairly strong dipole-dipole interaction (but still considerably weaker than the covalent or ionic bonds) between molecules containing hydrogen directly bonded to a small, highly electronegative atom, such as N, O, or F.

Native State

Refers to the occurrence of an element in an uncombined or free state in nature.

 

Hard Water

Water containing Fe3+, Ca2+, and Mg2+ ions, which forms precipates with soap.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Molarity

Number of moles of solute per litre of solution.

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.