Chemistry: Principles and Practice
3rd Edition
ISBN: 9780534420123
Author: Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher: Cengage Learning
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Chapter 12, Problem 12.76QE
An aqueous solution of sodium bromide freezes at −1.61 °C. What is the total molality of solute particles? How many grams of sodium bromide are present in 1 kg of water? (Assume an ideal value for the van’t Hoff factor.)
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Chapter 12 Solutions
Chemistry: Principles and Practice
Ch. 12 - Prob. 12.1QECh. 12 - Prob. 12.2QECh. 12 - Prob. 12.3QECh. 12 - Prob. 12.4QECh. 12 - Prob. 12.5QECh. 12 - Prob. 12.6QECh. 12 - Prob. 12.7QECh. 12 - Prob. 12.8QECh. 12 - Prob. 12.9QECh. 12 - Prob. 12.10QE
Ch. 12 - Prob. 12.11QECh. 12 - Prob. 12.12QECh. 12 - Create a flow diagram, similar to those used in...Ch. 12 - Prob. 12.14QECh. 12 - Prob. 12.15QECh. 12 - Prob. 12.16QECh. 12 - Prob. 12.17QECh. 12 - Prob. 12.18QECh. 12 - Prob. 12.19QECh. 12 - Prob. 12.20QECh. 12 - Prob. 12.21QECh. 12 - Prob. 12.22QECh. 12 - Prob. 12.23QECh. 12 - Prob. 12.24QECh. 12 - Prob. 12.25QECh. 12 - Prob. 12.26QECh. 12 - Prob. 12.27QECh. 12 - What is the molality of copper(II) bromide (CuBr2)...Ch. 12 - Prob. 12.29QECh. 12 - Prob. 12.30QECh. 12 - A water solution of sodium hypochlorite (NaOCl) is...Ch. 12 - Prob. 12.32QECh. 12 - Prob. 12.33QECh. 12 - Vinegar is a 5.0% solution of acetic acid...Ch. 12 - Prob. 12.35QECh. 12 - A 2.77 M NaOH solution in water has a density of...Ch. 12 - The density of a 3.75 M aqueous sulfuric acid...Ch. 12 - Prob. 12.40QECh. 12 - Prob. 12.41QECh. 12 - Prob. 12.42QECh. 12 - Predict the relative solubility of each compound...Ch. 12 - Predict the relative solubility of each compound...Ch. 12 - Prob. 12.45QECh. 12 - Prob. 12.46QECh. 12 - Prob. 12.47QECh. 12 - Prob. 12.48QECh. 12 - Prob. 12.49QECh. 12 - The solubility of ethylene (C2H4) in water at 20 C...Ch. 12 - Prob. 12.51QECh. 12 - Prob. 12.52QECh. 12 - Prob. 12.53QECh. 12 - Prob. 12.54QECh. 12 - Prob. 12.55QECh. 12 - Prob. 12.56QECh. 12 - From the data presented in Figure 12.11, determine...Ch. 12 - Prob. 12.58QECh. 12 - Prob. 12.59QECh. 12 - Prob. 12.60QECh. 12 - Prob. 12.61QECh. 12 - Prob. 12.62QECh. 12 - The vapor pressure of chloroform (CHCl3) is 360...Ch. 12 - Prob. 12.64QECh. 12 - Prob. 12.65QECh. 12 - Prob. 12.66QECh. 12 - Prob. 12.67QECh. 12 - Prob. 12.68QECh. 12 - Prob. 12.69QECh. 12 - Prob. 12.70QECh. 12 - A solution of 1.00 g of a protein in 20.0 mL water...Ch. 12 - Prob. 12.72QECh. 12 - Arrange the following aqueous solutions in order...Ch. 12 - Arrange the following solutions in order of...Ch. 12 - Prob. 12.75QECh. 12 - An aqueous solution of sodium bromide freezes at...Ch. 12 - Prob. 12.77QECh. 12 - Prob. 12.78QECh. 12 - Prob. 12.79QECh. 12 - Prob. 12.80QECh. 12 - A 0.029 M solution of potassium sulfate has an...Ch. 12 - The freezing point of a 0.031-m solution of...Ch. 12 - Prob. 12.83QECh. 12 - Prob. 12.84QECh. 12 - Prob. 12.85QECh. 12 - Prob. 12.86QECh. 12 - Prob. 12.87QECh. 12 - Prob. 12.88QECh. 12 - Prob. 12.89QECh. 12 - Prob. 12.90QECh. 12 - Predict the relative solubility of each compound...Ch. 12 - Prob. 12.92QECh. 12 - Prob. 12.94QECh. 12 - Prob. 12.95QECh. 12 - Prob. 12.96QECh. 12 - Sketch graphs of total vapor pressure versus the...Ch. 12 - Prob. 12.98QECh. 12 - Prob. 12.99QECh. 12 - Prob. 12.100QECh. 12 - Prob. 12.101QECh. 12 - Prob. 12.102QECh. 12 - Prob. 12.103QECh. 12 - A 10.00-mL sample of a 24.00% solution of ammonium...Ch. 12 - Prob. 12.105QECh. 12 - In the 1986 Lake Nyos disaster (see the chapter...Ch. 12 - Prob. 12.107QE
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- A 1.00 mol/kg aqueous sulfuric acid solution, H2SO4,freezes at 4.04 C. Calculate i, the vant Hoff factor,for sulfuric acid in this solution.arrow_forwardThe dispersed phase of a certain colloidal dispersion consists of spheres of diameter 1.0 102 nm. (a) What are the volume (V=43r2) and surface area (A = r2) of each sphere? (b) How many spheres are required to give a total volume of 1.0 cm3? What is the total surface area of these spheres in square meters?arrow_forwardCalcium chloride, CaCl2, has been used to melt ice from roadways. Given that the saturated solution is 32% CaCl2 by mass, estimate the freezing point.arrow_forward
- 6-111 As noted in Section 6-8C, the amount of external pressure that must be applied to a more concentrated solution to stop the passage of solvent molecules across a semipermeable membrane is known as the osmotic pressure The osmotic pressure obeys a law similar in form to the ideal gas law (discussed in Section 5-4), where Substituting for pressure and solving for osmotic pressures gives the following equation: RT MRT, where M is the concentration or molarity of the solution. (a) Determine the osmotic pressure at 25°C of a 0.0020 M sucrose (C12H22O11) solution. (b) Seawater contains 3.4 g of salts for every liter of solution. Assuming the solute consists entirely of NaCl (and complete dissociation of the NaCI salt), calculate the osmotic pressure of seawater at 25°C. (c) The average osmotic pressure of blood is 7.7 atm at 25°C. What concentration of glucose (C6H12O6) will be isotonic with blood? (d) Lysozyme is an enzyme that breaks bacterial cell walls. A solution containing 0.150 g of this enzyme in 210. mL of solution has an osmotic pressure of 0.953 torr at 25°C. What is the molar mass of lysozyme? (e) The osmotic pressure of an aqueous solution of a certain protein was measured in order to determine the protein's molar mass. The solution contained 3.50 mg of protein dissolved in sufficient water to form 5.00 mL of solution. The osmotic pressure of the solution at 25°C was found to be 1.54 torr. Calculate the molar mass of the protein.arrow_forwardCalculate the freezing point of 525 g of water that contains 25.0 g of NaCl. Assume i, the vant Hoff factor, is 1.85 for NaCl.arrow_forwardA forensic chemist is given a white solid that is suspected of being pure cocaine (C17H21NO4, molar mass = 303.35 g/mol). She dissolves 1.22 0.01 g of the solid in 15.60 0.01 g benzene. The freezing point is lowered by 1.32 0.04C. a. What is the molar mass of the substance? Assuming that the percent uncertainty in the calculated molar mass is the same as the percent uncertainty in the temperature change, calculate the uncertainty in the molar mass. b. Could the chemist unequivocally state that the substance is cocaine? For example, is the uncertainty small enough to distinguish cocaine from codeine (C18H21NO3, molar mass = 299.36 g/mol)? c. Assuming that the absolute uncertainties in the measurements of temperature and mass remain unchanged, how could the chemist improve the precision of her results?arrow_forward
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Solutions: Crash Course Chemistry #27; Author: Crash Course;https://www.youtube.com/watch?v=9h2f1Bjr0p4;License: Standard YouTube License, CC-BY