1. Determine the graphical partial molar volume of water and calculate the partial molar volume of potassium nitrate in an aqueous solution with a mass fraction of 0.06, using the following data:
ϕ2 0.01 0.03 0.05 0.07 0.10
Vsp*104, m3/kg 9.96 9.77 9.62 9.48 9.37

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