## Question

###### Plot of V, and V, as a funciton of Moranty Term V2 values (ml/mol) V1 Values...

Plot of V, and V, as a funciton of Moranty Term V2 values (ml/mol) V1 Values (ml/mol) 1.5 2.5 Molality (mol/kg) The plot above is a student's plot of the partial molar volumes of water. (V.) and NaCl, (V2). What is the Volume of a 2.00 molal solution of NaCl and water at room temperature containing 1000 nt mint

## Answers

Volume of the solution: 1.047 L

1 Partial molar volume of water V₂ - Partial molar volume of Wall. At 2 molal, V = 1 ml/mol K = 3.3 ml/mol 17066 (from graph). Now, total volume of solution - V V = n V + M₂ V2 moles of water .. 4 moles of Nace Molality = moles of solute (NaCl - 2 molal 1kg Solvent moles of solute = 2 mol/kg X 1kg = 2 mol 12= 2 mol n = mass of water - 1000 g 55.56 mol Molar mass V= (55-56 mol (17.66 ml •66 mile) + 2 mel (33 more + 2 mal (33 ml W-981.19 ml + 66 ml = 1047. 19 ml [V= 10 04 L

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