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Activity Coefficients definitions

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  • Activity Coefficient
    A numerical factor indicating deviation from ideal solution behavior, reflecting how ions interact differently in real solutions.
  • Ionic Strength
    A measure of the total concentration and charge of ions in a solution, influencing how ions affect each other's behavior.
  • Ideal Solution
    A hypothetical mixture where all ions are treated equally, with no differences in size or charge affecting interactions.
  • Non-Ideal Solution
    A real mixture where ions differ in size and charge, causing unequal interactions and deviations from ideal behavior.
  • Extended Debye-Hückel Equation
    A mathematical relationship connecting activity coefficients to ionic strength, ionic charge, and ionic size.
  • Ionic Charge
    The electrical property of an ion, positive or negative, that influences its effect on solution behavior.
  • Ionic Size
    The physical dimension of an ion, often measured in picometers, affecting its influence on activity coefficients.
  • Unity
    A value of one for the activity coefficient, indicating ideal solution behavior where all ions act identically.
  • Interpolation
    A method for estimating unknown values, such as activity coefficients, using known data points within a range.
  • Solubility Product Expression
    An equation relating the concentrations and activities of ions in a saturated solution to the solubility product constant.
  • Concentration
    The amount of a substance present in a given volume of solution, used in calculating ionic strength and activities.
  • KSP
    A constant representing the equilibrium between a solid and its ions in solution, often adjusted for non-ideal behavior.
  • Gamma
    The symbol commonly used to represent the activity coefficient in equations and calculations.
  • Picometer
    A unit of length, equal to one trillionth of a meter, frequently used to express ionic size in activity coefficient calculations.