Explanation Given Freezing point of ethanol (solvent) is − 114.6 ° C . Freezing point of solution is − 115.5 ° C . Volume of liquid ethanol (solvent) is 1.50 mL . Molal freezing point depression constant is 1.99 ° C/m . Mass of unknown solute (white powder) is 80 mg . Density of ethanol is 0.789 g/cm 3 . Molality of the solution is calculated by the formula, T f ( solution ) − T f ( solvent ) = − K f × Molality Molality = T f ( solvent ) − T f ( solution ) K f Where, T f ( solvent ) is the freezing point of pure ethanol (solvent). T f ( solution ) is the freezing point of solution. K f is the molal freezing point depression constant. Substitute the value of T f ( solvent ) , T f ( solution ) and K f in the above equation. Molality = ( − 114.6 ° C ) − ( − 115.5 ° C ) 1.99 ° C/m = 0.4523 m The conversion of milliliter ( mL ) into cubic centimeter ( cm 3 ) is done as, 1 mL = 1 cm 3 Hence, the conversion of 1.50 mL into cubic centimeter ( cm 3 ) is, 1.50 mL = 1 cm 3 1 mL × 1.50 mL =1 .50 cm 3 Mass of ethanol is calculated by the formula, Mass of ethanol = Density × Volume of ethanol Substitute the value of density and volume of ethanol in the above equation. Mass of ethanol = 0.789 g/cm 3 × 1 .50 cm 3 = 1.1835 g The conversion of gram ( g ) into kilogram ( kg ) is done as, 1 g = 10 − 3 kg Hence, the conversion of 1.1835 g into kilogram ( kg ) is, 1.1835 g = 10 − 3 kg 1 g × 1

Laboratory Experiments For Chemistry: The Central Science, Si Edition

14th Edition

ISBN: 9781292221335

Author: Theodore E. Brown

Publisher: PEARSON

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Chapter 13.5, Problem 13.10.1PE

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To determine: The identity of white powder.

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Chapter 13.5, Problem 13.9.2PE

Chapter 13.5, Problem 13.10.2PE

Chapter 13 Solutions

Laboratory Experiments For Chemistry: The Central Science, Si Edition

Ch. 13.3 - Prob. 13.1.1PE Ch. 13.3 - Prob. 13.1.2PE Ch. 13.3 - Prob. 13.2.1PE Ch. 13.3 - Prob. 13.2.2PE Ch. 13.4 - Prob. 13.3.1PE Ch. 13.4 - Prob. 13.3.2PE Ch. 13.4 - Prob. 13.4.1PE Ch. 13.4 - Prob. 13.4.2PE Ch. 13.4 - Prob. 13.5.1PE Ch. 13.4 - Prob. 13.5.2PE

Ch. 13.4 - Prob. 13.6.1PE Ch. 13.4 - Prob. 13.6.2PE Ch. 13.5 - Prob. 13.7.1PE Ch. 13.5 - Prob. 13.7.2PE Ch. 13.5 - Which aqueous solution will have the lowest...Ch. 13.5 - Prob. 13.8.2PE Ch. 13.5 - Prob. 13.9.1PE Ch. 13.5 - Prob. 13.9.2PE Ch. 13.5 - Prob. 13.10.1PE Ch. 13.5 - Practice Exercise 2 Camphor (C10 H16 O) melts at...Ch. 13.5 - Prob. 13.11.1PE Ch. 13.5 - Prob. 13.11.2PE Ch. 13 - Prob. 1DE Ch. 13 - Rank the contents of the following containers in...Ch. 13 - This figure shows the interaction of a cation with...Ch. 13 - Consider two ionic solids, both composed of singly...Ch. 13 - Which two statements about gas mixtures are true?...Ch. 13 - Prob. 5E Ch. 13 - 13.6 If you compare the solubilities of the noble...Ch. 13 - Prob. 7E Ch. 13 - Prob. 8E Ch. 13 - Prob. 9E Ch. 13 - Prob. 10E Ch. 13 - Suppose you had a balloon made of some highly...Ch. 13 - Prob. 12E Ch. 13 - Indicate whether each statement is true or false:...Ch. 13 - Indicate whether each statement is true or false:...Ch. 13 - Indicate the type of solute-solvent interaction...Ch. 13 - Indicate the principal type of solute-solvent...Ch. 13 - An ionic compound has a very negative H soln in...Ch. 13 - When ammonium chloride dissolves in water, the...Ch. 13 - Prob. 19E Ch. 13 - Prob. 20E Ch. 13 - Prob. 21E Ch. 13 - KBr is relatively soluble in water, yet its...Ch. 13 - The solubility of Cr (NO3)3 . 9 H2O in water is...Ch. 13 - The solubility of MnSO4 . H2 O in water at 20 C is...Ch. 13 - Prob. 25E Ch. 13 - Prob. 26E Ch. 13 - Prob. 27E Ch. 13 - Prob. 28E Ch. 13 - Prob. 29E Ch. 13 - Prob. 30E Ch. 13 - Would you expect stearic acid, CH3 (CH2)16COOH, to...Ch. 13 - Prob. 32E Ch. 13 - Prob. 33E Ch. 13 - Prob. 34E Ch. 13 - Indicate whether each statement is true or false:...Ch. 13 - 13.36 Indicate whether each statement is true or...Ch. 13 - The Henry’s law constant for helium gas in water...Ch. 13 - Prob. 38E Ch. 13 - Prob. 39E Ch. 13 - Prob. 40E Ch. 13 - Prob. 41E Ch. 13 - Prob. 42E Ch. 13 - 13.43 Calculate the morality of the following...Ch. 13 - Prob. 44E Ch. 13 - Calculate the molality of each of the following...Ch. 13 - (a) What is the molality of a solution formed by...Ch. 13 - Prob. 47E Ch. 13 - Prob. 48E Ch. 13 - Prob. 49E Ch. 13 - The density of toluene (C7H8) is 0.867 g\mL, and...Ch. 13 - Calculate the number of moles of solute present in...Ch. 13 - Calculate the number of moles of solute present in...Ch. 13 - Prob. 53E Ch. 13 - Describe how you would prepare each of the...Ch. 13 - Commercial aqueous nitric acid has a density of...Ch. 13 - Prob. 56E Ch. 13 - Prob. 57E Ch. 13 - Prob. 58E Ch. 13 - Prob. 59E Ch. 13 - Prob. 60E Ch. 13 - Prob. 61E Ch. 13 - Prob. 62E Ch. 13 - Consider two solutions, one formed by adding 10 g...Ch. 13 - Prob. 64E Ch. 13 - Prob. 65E Ch. 13 - (a) Calculate the vapor pressure of water above a...Ch. 13 - Prob. 67E Ch. 13 - At 20 oC, the vapor pressure of benzene (C6 H6) is...Ch. 13 - Prob. 69E Ch. 13 - Prob. 70E Ch. 13 - Prob. 71E Ch. 13 - Prob. 72E Ch. 13 - Using data from Table 13.3, calculate the freezing...Ch. 13 - Prob. 74E Ch. 13 - Prob. 75E Ch. 13 - Prob. 76E Ch. 13 - Prob. 77E Ch. 13 - Prob. 78E Ch. 13 - Prob. 79E Ch. 13 - Lauryl alcohol is obtained from coconut oil and is...Ch. 13 - Prob. 81E Ch. 13 - Prob. 82E Ch. 13 - The osmotic pressure of a 0.010 M aqueous solution...Ch. 13 - Based on the given data in Table 13.4, which...Ch. 13 - (a) Do colloids made only of gases exist? Why or...Ch. 13 - Prob. 86E Ch. 13 - An “emulsifying agent” is a compound that helps...Ch. 13 - Aerosols are important components of the...Ch. 13 - Prob. 89E Ch. 13 - Soaps consist of compounds such as sodium state,...Ch. 13 - Prob. 91AE Ch. 13 - Prob. 92AE Ch. 13 - Most fish need at least 4 ppm dissolved O2 in...Ch. 13 - The presence of the radioactive gas radon (Rn) in...Ch. 13 - Prob. 95AE Ch. 13 - Prob. 96AE Ch. 13 - The maximum allowable concentration of lead in...Ch. 13 - Prob. 98AE Ch. 13 - Prob. 99AE Ch. 13 - Prob. 100AE Ch. 13 - Prob. 101AE Ch. 13 - The normal boiling point of ethanol, is 78.4 0C....Ch. 13 - Prob. 103AE Ch. 13 - Carbon disulfide (CS2) boils at 46.30 o C and has...Ch. 13 - Prob. 105AE Ch. 13 - Prob. 106IE Ch. 13 - At ordinary body temperature (37 o C), the...Ch. 13 - Prob. 108IE Ch. 13 - Prob. 109IE Ch. 13 - Prob. 110IE Ch. 13 - Prob. 111IE Ch. 13 - Prob. 112IE Ch. 13 - At 35 o C the vapor pressure of acetone, (CH3)2CO,...Ch. 13 - Prob. 114IE

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