PHYS 538 |
| The classical freezing-point depression equation for aqueous salt solutions fails at high concentrations. In 2001, Zavitsas showed that assigning an independently determined hydration number to the cation of the salt largely corrected these concentration related deviations. Allowing for hydration of either ion from a water soluble salt, a hydration corrected freezing-point depression equation has been derived. This equation can be used to fit temperature concentration data or to solve for the hydration number(s) directly. In spite of how well this equation fits the experimental data used by Zavitsas, this new freezing-point depression equation indicates that more than the simple solvation of the cation is occurring. These results and possible extensions of this equation to other phenomena, such as solubility and vapor pressure determined activity coefficients, will be presented. |
|
PHYS Poster Session - General Theory
7:30 PM-10:00 PM, Wednesday, April 9, 2008 Morial Convention Center -- Hall A, Poster
Division of Physical Chemistry |