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The enthalpy change for a reaction is the same whether it occurs in one step or a series of steps.

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Ionization Constant

Equilibrium constant for the ionization of a weak electrolyte.

Salt Bridge

A U-shaped tube containing electrolyte, which connects two half-cells of a voltaic cell.

Formal Charge

A method of counting electrons in a covalently bonded molecule or ion, counts bonding electrons as though they were equally shared between the two atoms.

yttria

Y2O3: A white, water-insoluble powder, Y2O3, used chiefly in incandescent gas and acetylene mantles.

Insulator

Poor electric and heat conductor.

Dipole

Refers to the separation of charge between two covalently bonded atoms.

Rate of Reaction

Change in the concentration of a reactant or product per unit time.

Allotropes

Different forms of the same element in the same physical state.

Nonelectrolyte

A substance whose aqueous solutions do not conduct electricity.

Electron Deficient Compounds

Compounds that contain at least one atom (other than H) that shares fewer than eight electrons.