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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![1
I| L 2 | I 3
14 E II
13. What is the expected electrical conductivity of the following solutions? (Is it an
electrolyte? Why?)
(b) hydrochloric acid: HCI(aq) -- ionic
(c) glucose (sugar): C,H,,O,(aq) - covalent
Factors affecting solubility
17. Supersaturated solutions of most solids in water are prepared by cooling saturated
solutions. Supersaturated solutions of most gases in water are prepared by heating saturated
solutions. Explain the reason for the difference in the two.
concentration calculation
19. Calculate the percent by mass of KBr in a saturated solution of KBr in water at 10 °C.
(Use 60 g KBr solute per 100 g H,O solvent from Figure 11.16)
colligative properties: b.p. elevation
69. A sample of HgCl, weighing 9.41 g is dissolved in 32.75 g of ethanol, C,H,OH (K, =
1.20 °C/m). The boiling point elevation of the solution (AT) is 1.27 °C. Determine if HgCl,
is an electrolyte in ethanol (does it break apart into ions?). Show your calculations.
%3D
[First, use AT =K_m to find the predicted b.p. elevation based on molality of compound, vs
molality of ions & then compare your results to the observation.]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fcadd9602-7b97-43a2-a03a-75f45f80c22f%2Fe704323f-7271-44ef-94d6-84e3993db0e1%2Fjbh6xo_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1
I| L 2 | I 3
14 E II
13. What is the expected electrical conductivity of the following solutions? (Is it an
electrolyte? Why?)
(b) hydrochloric acid: HCI(aq) -- ionic
(c) glucose (sugar): C,H,,O,(aq) - covalent
Factors affecting solubility
17. Supersaturated solutions of most solids in water are prepared by cooling saturated
solutions. Supersaturated solutions of most gases in water are prepared by heating saturated
solutions. Explain the reason for the difference in the two.
concentration calculation
19. Calculate the percent by mass of KBr in a saturated solution of KBr in water at 10 °C.
(Use 60 g KBr solute per 100 g H,O solvent from Figure 11.16)
colligative properties: b.p. elevation
69. A sample of HgCl, weighing 9.41 g is dissolved in 32.75 g of ethanol, C,H,OH (K, =
1.20 °C/m). The boiling point elevation of the solution (AT) is 1.27 °C. Determine if HgCl,
is an electrolyte in ethanol (does it break apart into ions?). Show your calculations.
%3D
[First, use AT =K_m to find the predicted b.p. elevation based on molality of compound, vs
molality of ions & then compare your results to the observation.]
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