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Collision between molecules resulting in a reaction, one in which the molecules collide with proper relative orientations and sufficient energy to react.

 

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Rate-law Expression

Equation relating the rate of a reaction to the concentrations of the reactants and the specific rate of the constant.

Adsorption

Adhesion of a species onto the surfaces of particles.

Monoprotic Acid

Acid that can form only one hydronium ion per molecule, may be strong or weak. Acid that contains one ionizable hydrogen atom per formula unit.

Electrolyte

A substance whose aqueous solutions conduct electricity.

 

Deposition

The direct solidification of a vapor by cooling, the reverse of sublimation.

Electron

A subatomic particle having a mass of 0.00054858 amu and a charge of 1-.

Mass Action Expression

For a reversible reaction, aA + bB cC + dD the product of the concentrations of the products (species on the right), each raised to the power that corresponds to its coefficient in the balanced chemical equation, divided by the product of the concentrations of reactants (species on the left), each raised to the power that corresponds to its coefficient in the balanced chemical equation. At equilibrium the mass action expression is equal to K, at other times it is Q.[C]c[D]d [A]a[B]b = Q, or at equilibrium K.

Bonding Pair

Pair of electrons involved in a covalent bond.

Homogeneous Equilibria

Equilibria involving only one species in a single phase. For example, all gases, all liquids or all solids.

Atmosphere

A unit of pressure, the pressure that will support a column of mercury 760 mm high at 0 °C.