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The solvent-like phase in a colloid.

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Boron Hydrides

Binary compounds of boron and hydrogen.

Adhesive Forces

Forces of attraction between a liquid and another surface.

yttrium

A rare trivalent metallic element, found in gadolinite and other minerals. Symbol: Y, at. wt.: 88.905, at. no.: 39, sp. gr.: 4.47. Cf."rare-earth element."

Yttrium has a silver-metallic luster and is relatively stable in air unless finely divided. Turnings of the metal, however, ignite in air if their temperature exceeds 400oC. Yttrium oxide is one of the most important compounds of yttrium and accounts for the largest use. It is widely used in making YVO4 europium, and Y2O3 europium phosphors to give the red color in color television tubes.

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Organic Chemistry

The chemistry of substances that contain carbon-hydrogen bonds.

Salt Bridge

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

Enantiomer

One of the two mirror-image forms of an optically active molecule.

London Forces

Very weak and very short-range attractive forces between short-lived temporary (induced) dipoles, also called dispersion Forces.

Inhibitory Catalyst

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

Acidic Salt

A salt containing an ionizable hydrogen atom. Acidic salt does not necessarily produce acidic solutions.

Hydrocarbons

Compounds that contain only carbon and hydrogen.

Physical Change

A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.

 

Deuterium

An isotope of hydrogen whose atoms are twice as massive as ordinary hydrogen,deuterion atoms contain both a proton and a neutron in the nucleus.

xylan

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

Fatty Acids

An aliphatic acid, many can obtained from animal fats.

Ionization Isomers

Isomers that result from the interchange of ions inside and outside the coordination sphere.

Surface Tension

It is the force in dynes acting along the surface of the liquid 1cm in length and perpendicular to it.

Compound

A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.

Half-Life

The time required for half of a reactant to be converted into product(s). The time required for half of a given sample to undergo radioactive decay.

Geometrical Isomers

Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.