anion exchange

anion exchange [CHEM] A type of ion exchange in which the immobilized functional

groups on the solid resin are positive

anion

anion [CHEM] An ion that is negatively charged

animal charcoal

animal charcoal [CHEM] Charcoal obtained by the destructive distillation of animal

matter at high temperatures; used to adsorb organic coloring matter.

animal black

animal black [CHEM] Finely divided carbon made by calcination of animal bones or

ivory; used for pigments, decolorizers, and purifying agents; varieties include bone

black and ivory black

aniline-formaldehyde resin

aniline-formaldehyde resin [CHEM] A thermoplastic resin made by polymerizing ani

line and formaldehyde

anhydride

anhydride [CHEM] A compound formed from an acid by removal of water

anhydrous

anhydrous [CHEM] Being without water, especially water of hydration

analytical chemistry

analytical chemistry [CHEM] The branch of chemistry dealing with techniques which

yield any type of information about chemical systems

analog

analog [CHEM] A compound whose structure is similar to that of another compound

but whose composition differs by one element

amphoterism

amphoterism [CHEM] The property of being able to react either as an acid or a base

amphoteric

amphoteric [CHEM] Having both acidic and basic characteristics. Also known as

amphiprotic

ampholyte

ampholyte [CHEM] An amphoteric electrolyte

ampholytic detergent

ampholytic detergent [CHEM] A detergent that is cationic in acidic solutions and
anionic in basic solutions

amphiprotic

amphiprotic See amphoteric

amphiphile

amphiphile [CHEM] A molecule which has a polar head attached to a long hydrophobic

tail

amount of substance

amount of substance [CHEM] A measure of the number of elementary entities present

in a substance or system; usually measured in moles

ammonolysis

ammonolysis [CHEM] 

1. A dissociation reaction of the ammonia molecule producing

H+ and NH2 species.

 2. Breaking of a bond by addition of ammonia. 

ammonia water

ammonia water [CHEM] A water solution of ammonia; a clear colorless liquid that is

basic because of dissociation of NH4OH to produce hydroxide ions; used as a reagent,

solvent, and neutralizing agent. { ə mo ¯ n yə wo ˙ d ər}

ammonification

ammonification [CHEM] Addition of ammonia or ammonia compounds, especially to

the soil. { ə ma ¨n ə fə ka ¯ shən}

ammoniation

ammoniation [CHEM] Treating or combining with ammonia. { ə mo ¯ n e ¯ a ¯ shən}