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The Chemical Glossary currently has 651 chemical entries. You may search the Chemical Glossary by entering the keyword in the search box or by browsing the entire chemical glossary by letter in alphabetical order.

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Inhibitory Catalyst

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

Law of Definite Proportions (Law of Constant Composition)

The law stating that a pure substance will always have the same percent by weight. Different samples of a pure compound always contain the same elements in the same proportions by mass.

Exothermicity

The release of heat by a system as a process occurs.

xylan

The pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural.

Nickel-cadmium cell (Nicad battery)

A dry cell in which the anode is Cd, the cathode is NiO2, and the electrolyte is basic.

Nernst Equation

Corrects standard electrode potentials for nonstandard conditions.

Safranine

Also called "phenosafranine". A purplish-red, water-soluble dye, C18H14N4, used for textiles and as a stain in microscopy.

Hydrate

A solid compound that contains a definite percentage of bound water.

Acid

A substance that produces H+(aq) ions in aqueous solution. Strong acids ionize completely or almost completely in dilute aqueous solution. Weak acids ionize only slightly. Chemicals or substances having the property of an acid are said to be acidic.

Electrolyte

A substance whose aqueous solutions conduct electricity.