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10 Cards in this Set

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Ideal solution

A solution whose collective properties are proportional to the concentration of the solutes

Non ideal solution

A solution where ions of opposite or the same charge attract or repel each other due to electric forces.

(Thermodynamic) activity

Is proportional to concentration multiplied by a constant

Activity coefficients

Relate measured ion concentration to thermodynamic activities

Activity coefficient depend on

Nature and ionic strength of solvents and hydrated ion size of individual species

Ionic strength

Expresses the charge concentration in the solution

Activity coefficient equations

Debye-huckel, extended Debye-huckel and davis theories

Controls on activity coefficient

Decreases with ionic strength and increased charge of ion

Fugacity

Equivalent of activity coefficient for gases.

Fugacity is determined by

Multiplying fugacity coefficient by partial pressure