Lab Data Freezing point depression is reported as a positive number Freezing-point depression constant ("C/m) Freezing-p

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Lab Data Freezing Point Depression Is Reported As A Positive Number Freezing Point Depression Constant C M Freezing P 1 (61.7 KiB) Viewed 34 times

Lab Data Freezing point depression is reported as a positive number Freezing-point depression constant ("C/m) Freezing-point of DI water (°C) AB DAT Magnesium chloride Molar mass (g/mol) Mass of calorimeter (g) Volume of DI water (mL) Mass of magnesium chloride (g) Moles of magnesium chloride (mol) Mass of calorimeter + solution (g) Mass of calorimeter + solution + ice (g) Freezing-point of solution ("C) Mass of calorimeter + ice after decanting (g) Mass of ice added (9) Mass of ice remaining after decanting (g) Mass of melted ice (g) Mass of water in final solution (g) Mass of water in final solution (kg) Molality of solution (m) Freezing-point depression ("C) van't Hoff factor Solution 1 MgCl, 95.21 17.28 49.0 1.46 0.0153 67.51 113.17 -1.42 43.92 45.66 26.64 19.02 67.79 0.06779 0226 -1.26 How to calculate zan't Hoff factor 1.86 -0.20 Solution 2 MgCl 95.21 -X Solution 3 MgCh 95.21 5 6 3 Place calorimeter on stir plate. Turn on stir plate PHASE 5: Measure freezing-point of solution < Complete the following steps ice on balance. Record mass in Lab Data. Insert temperature probe into calorimeter. Monitor temperature Click on the section of the graph that indicates the freezing-point of solution 1. Record freezing point in Lab Data SUBM Zoom out. Remove temperature probe. Place calorimeter over sink and decant solution Weigh calorimeter and remaining ice on balance. Record mass in Lab Data 8 Pla used calorimeter in Wash/Waste bin Calculate following and record in Lab Data Mass of ice added Mass of ice remaining Mass of melted ice • Mass of water in solution (in grams and kilograms) • Molality • Freezing point depression GO TO PHASE 6