General chemistry

General chemistry

Industry: Chemistry

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General chemistry

Activity

Chemistry; General chemistry

An effective concentration used in thermodynamic calculations in place of the actual concentration to allow equations developed for ideal solutions to be used to treat real solutions.

Ductile

Chemistry; General chemistry

Capable of being drawn into wire. Metals are typically ductile materials.

Concentration of a substance in a mixture measured as moles of the substance per mole of mixture. For example, the mole fraction of oxygen in air is about 0.21, which means that 1 mol of air contains ...

Supercritical fluid

Chemistry; General chemistry

A fluid state that occurs when the pressure and temperature exceed the substance's critical pressure and critical temperature . Supercritical fluids fill their containers like gases but dissolve ...

Activity coefficient

Chemistry; General chemistry

The ratio of activity to concentration; a = c where a, , and c are the activity, activity coefficient, and concentrations, respectively. Activity coefficients are usually obtained from ...

Dynamic equilibrium

Chemistry; General chemistry

Dynamic equilibrium is established when two opposing processes are occuring at precisely the same rate, so that there is no apparent change in the system over long periods of time.

Molecular equation

Chemistry; General chemistry

A molecular equation is a balanced chemical equation in which ionic compounds are written as neutral formulas rather than as ions. For example, AgNO3(aq) + NaCl(aq) = AgCl(s) + NaNO3(aq) is a ...