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A method used to determine the molecular weights of volatile liquids.

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Displacement Reactions

Reactions in which one element displaces another from a compound.

 

Formula Weight

The mass of one formula unit of a substance in atomic mass units.

 

Combination Reaction

Reaction in which two substances (elements or compounds) combine to form one compound.

Electrolytic Cells

Electrochemical cells in which electrical energy causes nospontaneous redox reactions to occur. An electrochemical cell in which chemical reactions are forced to occur by the application of an outside source of electrical energy.

Law of Combining Volumes (Gay-Lussac's Law)

At constant temperature and pressure, the volumes of reacting gases (and any gaseous products) can be expressed as ratios of small whole numbers.

 

Base

A substance that produces OH (aq) ions in aqueous solution. Strong soluable bases are soluble in water and are completely dissociated. Weak bases ionize only slightly.

End Point

The point at which an indicator changes colour and a titration is stopped.

Heterocyclic Amine

Amine in which the nitrogen is part of a ring.

Zone Refining

A method of purifying a bar of metal by passing it through an induction heater, this causes impurties to move along a melted portion. This method applies the fact when a metal crystallizes on cooling, impurities are automatically expelled as they do not form part of the crystal.

Saccharic acid

A white, needlelike, crystalline, water-soluble solid or syrup, C6H10O8, usually made by the oxidation of cane sugar, glucose, or starch by nitric acid. Also called "Glucaric acid."

Equilibrium or Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, the state of a system when neither forward or reverse reaction is thermodynamically favored.

Rate of Reaction

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

Equivalent Weight

An oxidizing or reducing agent, who's mass gains (oxidizing agents) or loses (reducing agents) 6.022 x 1023 electrons in a redox reaction.
The mass of an acid or base that furnishes or reacts with 6.022 x 1023 H3O+ or OH- ions.

Canal Ray

Stream of positively charged particles (cations) that moves toward the negative electrode in cathode ray tubes, observed to pass through canals in the negative electrode.

Critical Pressure

The pressure required to liquefy a gas (vapor) at its critical temperature.

Aryl Group

Group of atoms remaining after a hydrogen atom is removed from the aromatic system.

Conjugate Acid-base Pair

In Bronsted-Lowry terminology, a reactant and product that differ by a proton, H+.

Element

A substance that cannot be decomposed into simpler substances by chemical means.

Percent Purity

The percent of a specified compound or element in an impure sample.

Saturated Solution

Solution in which no more solute will dissolve.