ACTIVITY COEFFICIENT


Meaning of ACTIVITY COEFFICIENT in English

Number expressing the ratio of a substance's chemical activity to its molar concentration (see mole ).

The measured concentration of a substance may not be an accurate indicator of its chemical effectiveness as represented by the equation for a particular reaction; in such cases, the activity is calculated by multiplying the concentration by the activity coefficient. In solutions , the activity coefficient is a measure of how much the solution differs from an ideal solution.

Britannica English dictionary.      Английский словарь Британика.