5. The following graph is a calibration curve for the density of an aqueous salt solution versus percent salt concentration. If the density of seawater is 1.025 g/mL, what is the percent salt concentration? 1.20 1.15 1.10 1.05 1.00 0.95 0 5 15 10 Percent Salt 20 25

5. The following graph is a calibration curve for the density of an aqueous salt solution versus percent salt concentration. If the density of seawater is 1.025 g/mL, what is the percent salt concentration? 1.20 1.15 1.10 1.05 1.00 0.95 0 5 15 10 Percent Salt 20 25

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 90QRT

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Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

5. The following graph is a calibration curve for the density of an aqueous salt solution versus
percent salt concentration. If the density of seawater is 1.025 g/mL, what is the percent salt
concentration?
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Percent Salt
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Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride (CaCl2) is sometimes used for this purpose too. Let us compare the effectiveness of equal masses of these two compounds in lowering the freezing point of water, by calculating the freezing point depression of solutions containing 200. g of each salt in 1.00 kg of water. (An advantage of CaCl2 is that it acts more quickly because it is hygroscopic, that is. it absorbs moisture from the air to give a solution and begin the process. A disadvantage is that this compound is more costly.)
Specifications for lactated Ringers solution, which is used for intravenous (IV) injections, are as follows to reach 100. mL of solution: 285315 mg Na+ 14.117.3 mg K+ 4.9Q.O mg Ca2+ 368408 mg Cl 231261 mg lactate, C3H5O3 a. Specify the amount of NaCl, KCl, CaCl2 2H2O, and NaC3H5O3 needed to prepare 100. mL lactated Ringers solution. b. What is the range of the osmotic pressure of the solution at 37C, given the preceding specifications?
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