The temperature-dependent form of the extended Debye-Huckel equation is where _ is the activity coefficient, _…

The temperature-dependent form of the extended Debye-Huckel
equation is where _ is the activity coefficient, _ is the
dielectric constant of water (a unitless quantity), T is the
temperature (in units of K), z is the charge of the ion, _ is the
ionic strength (in units of mol/L), and _ is the ion size parameter
(in units of pm). The temperature-dependence of the dielectric
constant is given by the equation where the temperature is in units
of Kelvin. What is the value of the activity coefficient of Pb2 at
90.00C when the ionic strength is 0.051 M?

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