125 colligativelab

125 colligativelab - Chem 125 Name: Partner: Partner:...

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Chem 125 Name: Partner: Partner: Colligative Properties Report Sheet Part A: Determining ∆T FP for Water • Experimental T FP for water: .46 °C Part B: Determining ∆T FP for a Solution • Name of Solution investigated: Magnesium Chloride • Molal Solution Concentration: .100 m show calculation Trial T FP Solution (°C) ∆T FP (°C) 1 .07 .53 2 .07 .53 3 .07 .53 • Average ∆T FP : .53 °C Part C: Determining the van’t Hoff Factor ( i ) for all Solutions You must share your results from Part A with everyone at your cluster to complete the table below. • Equation for FP Depression: ∆T FP =k f mi • K F constant for pure water: 1.86 °C/ m Solution Molality (mol/kg) Average ∆T FP Theoretical i Experimental i sodium nitrate .099 .32 2 1.71 dextrose 1.001 2.10 1 1.13 magnesium chloride .100 .53 3 2.85 sodium sulfate .100 .51 3 2.74 For all solutions in Part A (not just yours) , show clearly how you obtained values for theoretical i and experimental i ( i = the van’t Hoff factor).
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125 colligativelab - Chem 125 Name: Partner: Partner:...

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