Exercise 1(a) A 10-g quantity of a compound is dissolved in 100 g of water. The solution formed has a meltingpoint of -7.14°C. Is the compound KCI, NazS, or Na3PO4?(b) An aqueous solution of a nonelectrolyte is made by dissolving the solute in 1 L of water. Thesolution has a freezing point of -1.5°C. What volume of water must be added to change thefreezing point to -1.15°C?(c) 100 mL of a solution of physiological saline (0.92% NaCl by mass) is diluted by the addition of250 mL of water. What is the osmotic pressure of the final solution at 37°C? Assume that NaCldissociates completely into Na*and Cl (aa).(aa)

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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QUESTION 23 What is the freezing point (°C) of a solution prepared by dissolving 6.10 g of (NH4)2SO4 (formula weight = 132 g/mol) in 135 g of water? The molal freezing point depression constant for water is 1.86°C/m. Assume complete dissociation in solution. Express your answer in numerical form (NOT scientific notation) to 3 significant figures.
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