CHEMISTRY (LOOSELEAF) >CUSTOM<
13th Edition
ISBN: 9781264348992
Author: Chang
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 12, Problem 12.116QP
A mixture of ethanol and 1-propanol behaves ideally at 36°C and is in equilibrium with its vapor. If the mole fraction of ethanol in the solution is 0.62, calculate its mole fraction in the vapor phase at this temperature. (The vapor pressures of pure ethanol and 1-propanol at 36°C are 108 mmHg and 40.0 mmHg, respectively.)
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Chapter 12 Solutions
CHEMISTRY (LOOSELEAF) >CUSTOM<
Ch. 12.2 - Prob. 1PECh. 12.2 - Prob. 1RCFCh. 12.2 - What is the strongest type of intermolecular force...Ch. 12.3 - Prob. 2PECh. 12.3 - Prob. 3PECh. 12.3 - Prob. 4PECh. 12.3 - Prob. 5PECh. 12.3 - A solution is prepared at 20C and its...Ch. 12.3 - Determine the percent composition by mass of LiCl...Ch. 12.3 - Prob. 3RCF
Ch. 12.4 - Using Figure 12.3, rank the potassium salts in...Ch. 12.5 - Calculate the molar concentration of oxygen in...Ch. 12.5 - Which of the following gases has the greatest...Ch. 12.5 - Prob. 2RCFCh. 12.6 - Calculate the vapor pressure of a solution made by...Ch. 12.6 - Prob. 8PECh. 12.6 - Prob. 9PECh. 12.6 - A solution of 0.85 g of an organic compound in...Ch. 12.6 - Prob. 11PECh. 12.6 - A solution contains equal molar amounts of liquids...Ch. 12.6 - What does it mean when we say that the osmotic...Ch. 12.6 - Calculate the boiling point and freezing point of...Ch. 12.7 - The freezing-point depression of a 0.100 m MgSO4...Ch. 12.7 - Indicate which compound in each of the following...Ch. 12.7 - Prob. 2RCFCh. 12 - Prob. 12.1QPCh. 12 - Prob. 12.2QPCh. 12 - Briefly describe the solution process at the...Ch. 12 - Prob. 12.4QPCh. 12 - Prob. 12.5QPCh. 12 - As you know, some solution processes are...Ch. 12 - Prob. 12.7QPCh. 12 - Describe the factors that affect the solubility of...Ch. 12 - Prob. 12.9QPCh. 12 - Prob. 12.10QPCh. 12 - Arrange the following compounds in order of...Ch. 12 - Explain the variations in solubility in water of...Ch. 12 - Prob. 12.13QPCh. 12 - Prob. 12.14QPCh. 12 - Calculate the percent by mass of the solute in...Ch. 12 - Calculate the amount of water (in grams) that must...Ch. 12 - Prob. 12.17QPCh. 12 - Prob. 12.18QPCh. 12 - Calculate the molalities of the following aqueous...Ch. 12 - For dilute aqueous solutions in which the density...Ch. 12 - Prob. 12.21QPCh. 12 - The concentrated sulfuric acid we use in the...Ch. 12 - Prob. 12.23QPCh. 12 - The density of an aqueous solution containing 10.0...Ch. 12 - Prob. 12.25QPCh. 12 - Describe the fractional crystallization process...Ch. 12 - A 3.20-g sample of a salt dissolves in 9.10 g of...Ch. 12 - The solubility of KNO3 is 155 g per 100 g of water...Ch. 12 - Prob. 12.29QPCh. 12 - Discuss the factors that influence the solubility...Ch. 12 - Prob. 12.31QPCh. 12 - Prob. 12.32QPCh. 12 - Prob. 12.33QPCh. 12 - A man bought a goldfish in a pet shop. Upon...Ch. 12 - A beaker of water is initially saturated with...Ch. 12 - A miner working 260 m below sea level opened a...Ch. 12 - The solubility of CO2 in water at 25C and 1 atm is...Ch. 12 - The solubility of N2 in blood at 37C and at a...Ch. 12 - Prob. 12.39QPCh. 12 - Write the equation representing Raoults law, and...Ch. 12 - Prob. 12.41QPCh. 12 - Prob. 12.42QPCh. 12 - Prob. 12.43QPCh. 12 - Prob. 12.44QPCh. 12 - Prob. 12.45QPCh. 12 - Prob. 12.46QPCh. 12 - Prob. 12.47QPCh. 12 - Describe how you would use freezing-point...Ch. 12 - Prob. 12.49QPCh. 12 - Prob. 12.50QPCh. 12 - The vapor pressure of benzene is 100.0 mmHg at...Ch. 12 - The vapor pressures of ethanol (C2H5OH) and...Ch. 12 - The vapor pressure of ethanol (C2H5OH) at 20C is...Ch. 12 - Prob. 12.54QPCh. 12 - What are the boiling point and freezing point of a...Ch. 12 - Prob. 12.56QPCh. 12 - Pheromones are compounds secreted by the females...Ch. 12 - The elemental analysis of an organic solid...Ch. 12 - How many liters of the antifreeze ethylene glycol...Ch. 12 - Prob. 12.60QPCh. 12 - Prob. 12.61QPCh. 12 - A solution of 2.50 g of a compound having the...Ch. 12 - A solution containing 0.8330 g of a polymer of...Ch. 12 - Prob. 12.65QPCh. 12 - A solution of 6.85 g of a carbohydrate in 100.0 g...Ch. 12 - Prob. 12.67QPCh. 12 - Prob. 12.69QPCh. 12 - Consider two aqueous solutions, one of sucrose...Ch. 12 - Arrange the following solutions in order of...Ch. 12 - Prob. 12.72QPCh. 12 - What are the normal freezing points and boiling...Ch. 12 - At 25C the vapor pressure of pure water is 23.76...Ch. 12 - Both NaCl and CaCl2 are used to melt ice on roads...Ch. 12 - A 0.86 percent by mass solution of NaCl is called...Ch. 12 - Prob. 12.77QPCh. 12 - Calculate the osmotic pressure of a 0.0500 M MgSO4...Ch. 12 - Prob. 12.79QPCh. 12 - Prob. 12.80QPCh. 12 - Prob. 12.81QPCh. 12 - Water and methanol are miscible with each other...Ch. 12 - Lysozyme is an enzyme that cleaves bacterial cell...Ch. 12 - Prob. 12.84QPCh. 12 - Prob. 12.85QPCh. 12 - Two liquids A and B have vapor pressures of 76...Ch. 12 - Prob. 12.87QPCh. 12 - Prob. 12.88QPCh. 12 - Prob. 12.89QPCh. 12 - Calculate the mass of naphthalene (C10H8) that...Ch. 12 - Consider the three mercury manometers shown. One...Ch. 12 - Prob. 12.92QPCh. 12 - Prob. 12.93QPCh. 12 - A solution of 1.00 g of anhydrous aluminum...Ch. 12 - Desalination is a process of removing dissolved...Ch. 12 - Prob. 12.96QPCh. 12 - A protein has been isolated as a salt with the...Ch. 12 - Prob. 12.98QPCh. 12 - Hydrogen peroxide with a concentration of 3.0...Ch. 12 - State which of the alcohols listed in Problem...Ch. 12 - Prob. 12.101QPCh. 12 - Iodine (I2) is only sparingly soluble in water...Ch. 12 - Prob. 12.103QPCh. 12 - In the apparatus shown, what will happen if the...Ch. 12 - Prob. 12.105QPCh. 12 - Concentrated hydrochloric acid is usually...Ch. 12 - Explain each of the following statements: (a) The...Ch. 12 - Prob. 12.108QPCh. 12 - A 0.050 M hydrofluoric acid (HF) solution is 11...Ch. 12 - Shown here is a plot of vapor pressures of two...Ch. 12 - Prob. 12.111QPCh. 12 - Prob. 12.112QPCh. 12 - Prob. 12.113QPCh. 12 - Prob. 12.114QPCh. 12 - Prob. 12.115QPCh. 12 - A mixture of ethanol and 1-propanol behaves...Ch. 12 - Prob. 12.117QPCh. 12 - Prob. 12.118QPCh. 12 - Prob. 12.119QPCh. 12 - Acetic acid is a weak acid that ionizes in...Ch. 12 - Making mayonnaise involves beating oil into small...Ch. 12 - Acetic acid is a polar molecule and can form...Ch. 12 - A 2.6-L sample of water contains 192 g of lead....Ch. 12 - Certain fishes in the Antarctic Ocean swim in...Ch. 12 - Prob. 12.125QPCh. 12 - Prob. 12.126QPCh. 12 - Prob. 12.127QPCh. 12 - At 27C, the vapor pressure of pure water is 23.76...Ch. 12 - Prob. 12.129QPCh. 12 - Liquids A (molar mass 100 g/mol) and B (molar mass...Ch. 12 - A very long pipe is capped at one end with a...Ch. 12 - Prob. 12.132QPCh. 12 - A mixture of liquids A and B exhibits ideal...Ch. 12 - Prob. 12.134QPCh. 12 - (a) Derive the equation relating the molality (m)...Ch. 12 - Prob. 12.136QPCh. 12 - A student carried out the following procedure to...Ch. 12 - Valinomycin is an antibiotic. It functions by...Ch. 12 - Prob. 12.139QPCh. 12 - Here is an after-dinner trick. With guests still...Ch. 12 - The molecule drawn here has shown promise as an...Ch. 12 - The Henrys law constant of oxygen in water at 25C...Ch. 12 - The diagram shows the vapor pressure curves for...Ch. 12 - Prob. 12.144QPCh. 12 - Prob. 12.146QP
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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_forward6-111 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_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
- The vapor pressures of several solutions of water-propanol (CH3CH2CH2OH) were determined at various compositions, with the following data collected at 45C: H2O Vapor pressure(torr) 0 74.0 0.15 77.3 0.37 80.2 0.54 81.6 0.69 80.6 0.83 78.2 1.00 71.9 a. Are solutions of water and propanol ideal? Explain. b. Predict the sign of Hsoln for water-propanol solutions. c. Are the interactive forces between propanol and water molecules weaker than, stronger than, or equal to the interactive forces between the pure substances? Explain. d. Which of the solutions in the data would have the lowest normal boiling point?arrow_forwardPredict the relative solubility of each compound in the two solvents, based on the intermolecular attractions. (a) Is potassium iodide more soluble in water or in methylene chloride (CH2Cl2)? (b) Is toluene (C6H5CH3) more soluble in benzene (C6H6) or in water? (c) Is ethylene glycol (C2H4(OH)2) more soluble in hexane (C6H14) or in ethanol (C2H5OH)?arrow_forwardVapor-pressure lowering is a colligative property, as are freezing-point depression and boiling-point elevation. What is a colligative property? Why is the freezing point depressed for a solution as compared to the pure solvent? Why is the boiling point elevated for a solution as compared to the pure solvent? Explain how to calculate T for a freezing-point depression problem or a boiling-point elevation problem. Of the solvents listed in Table 10-5, which would have the largest freezing-point depression for a 0.50 molal solution? Which would have the smallest boiling-point elevation for a 0.50 molal solution? A common application of freezing-point depression and boiling-point elevation experiments is to provide a means to calculate the molar mass of a nonvolatile solute. What data are needed to calculate the molar mass of a nonvolatile solute? Explain how you would manipulate these data to calculate the molar mass of the nonvolatile solute.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