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A listing of metals (and hydrogen) in order of decreasing activity.

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Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Barometer

A device for measuring pressure.

Spectrochemical Series

Arrangement of ligands in order of increasing ligand field strength.

Basic Salt

A salt containing an ionizable OH group.

Phosphoric Acid

H3P04, Colorless liquid or rhombic crystals, decomposes before it will boil. Used mostly in the metal etchant. Used in cleaning operations to remove encrusted surface matter and mineral scale found on metal equipment such as boilers and steam producing equipment. Also used to brighten metals and remove rust.

Specific Rate Constant

An experimentally determined (proportionality) constant, which is different for different reactions and which changes only with temperature, k in the rate-law expression: Rate = k [A] x [B]v.

Inhibitory Catalyst

An inhibitor, a catalyst that decreases the rate of reaction.

Chemical Change

A change in which one or more new substances are formed.

Net Ionic Equation

Equation that results from canceling spectator ions and eliminating brackets from a total ionic equation.

Dipole

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