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I'm actually taking a physical chem course and i have to hand in a report onpartial molar volumes in NaCl solutions...I'm not really sure how the concept works and I'm wondering if anyone could clarify! Thanks
Partial molar volume is a measure of the change in volume of a solution when a small amount of solute is added to a large amount of solvent. It is the volume contribution of a solute to the overall volume of a solution.
The partial molar volume of a solute in a solution can be calculated by taking the derivative of the solution's total volume with respect to the number of moles of the solute added.
The interactions between solute and solvent molecules in a solution can lead to a change in the volume of the solution. This results in a difference between the partial molar volume of a solute in a solution and its pure form.
Partial molar volumes provide insights into the interactions between solute and solvent molecules in a solution. They can also be used to calculate other thermodynamic properties such as the excess molar volume and activity coefficients.
The partial molar volume of NaCl solutions increases with increasing concentration due to the increased interactions between Na+ and Cl- ions in the solution. At high concentrations, the partial molar volume reaches a plateau, indicating that the solution has reached its maximum packing density.