29. What volume of a 5.0 M CaCl2 solution do you need to make 1.0 L of a 0.1 M CaCl2 solution?30. Use the ideal gas law to determine what is the volume of 10.0 moles of gas under 5.0 atm ofpressure at a temperature of 200.0 degrees Celsius? Keep track of significant figures!31. 1 mole of ANY ideal gas has the same volume at room temperature and atmospheric pressure.T / F32. If an ideal gas is held at constant temperature and the pressure is increased, the volume of thegas: a. increases b. does not change c. decreases33. What are the spectator ions from the following reaction? AgNO3(aq) + MgCl2(aq) → ?a. Mg2+ and CI b. Ag* and Cl c. Mg²+ and NO3 d. Ag* and Cl34. AG = AH -TAS is the equation for the Gibbs free energy of reaction for a chemical process. Ifthe AG for a reaction is negative, the reaction can proceed to the products. T/F35. AG = AH -TAS is the equation for the Gibbs free energy of reaction for a chemical process. Ifthe AH for a reaction is positive and the AS is positive, it is possible for the reaction to proceedto the products. T/ F36. AG = AH -TAS is the equation for the Gibbs free energy of reaction for a chemical process. Ifthe AH for a reaction is positive and the AS is negative, it is possible for the reaction to proceedto the products. T/F37. НBr(aq) + коНag) >The reaction in problem 37 creates which of the following products?a.H2(g)b. H20(1)c. no reactiond. K20(s) 14C.12108b.6.42а.345738.In the graph for number 38, volume of base added to an acid solution is on the x axis and the pHof the acid solution is on the y axis. Which point on the graph indicates the equivalence point ofthe reaction where moles of acid = moles of base added?39. What is the pH of a solution that is 0.10M HCI(aq)?a. 10 b. -1 c. 1 d. -1040. What is the pH of a solution that is 0.10 M NaOH(aq) a. 13 b. 14 c. -1 d. 1

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Chemistry: An Atoms First Approach

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ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

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Chapter10: Properties Of Solutions

Section: Chapter Questions

Problem 129CP: In some regions of the southwest United States, the water is very hard. For example, in Las Cruces,...

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Question

29. What volume of a 5.0 M CaCl2 solution do you need to make 1.0 L of a 0.1 M CaCl2 solution?
30. Use the ideal gas law to determine what is the volume of 10.0 moles of gas under 5.0 atm of
pressure at a temperature of 200.0 degrees Celsius? Keep track of significant figures!
31. 1 mole of ANY ideal gas has the same volume at room temperature and atmospheric pressure.
T / F
32. If an ideal gas is held at constant temperature and the pressure is increased, the volume of the
gas: a. increases b. does not change c. decreases
33. What are the spectator ions from the following reaction? AgNO3(aq) + MgCl2(aq) → ?
a. Mg2+ and CI b. Ag* and Cl c. Mg²+ and NO3 d. Ag* and Cl
34. AG = AH -TAS is the equation for the Gibbs free energy of reaction for a chemical process. If
the AG for a reaction is negative, the reaction can proceed to the products. T/F
35. AG = AH -TAS is the equation for the Gibbs free energy of reaction for a chemical process. If
the AH for a reaction is positive and the AS is positive, it is possible for the reaction to proceed
to the products. T/ F
36. AG = AH -TAS is the equation for the Gibbs free energy of reaction for a chemical process. If
the AH for a reaction is positive and the AS is negative, it is possible for the reaction to proceed
to the products. T/F
37. НBr(aq) + коНag) >
The reaction in problem 37 creates which of the following products?
a.H2(g)
b. H20(1)
c. no reaction
d. K20(s)

14
C.
12
10
8
b.
6.
4
2
а.
3
4
5
7
38.
In the graph for number 38, volume of base added to an acid solution is on the x axis and the pH
of the acid solution is on the y axis. Which point on the graph indicates the equivalence point of
the reaction where moles of acid = moles of base added?
39. What is the pH of a solution that is 0.10M HCI(aq)?
a. 10 b. -1 c. 1 d. -10
40. What is the pH of a solution that is 0.10 M NaOH(aq) a. 13 b. 14 c. -1 d. 1

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The solubility of nitrogen in water is 8.21 104 mol/L at 0C when the N2 pressure above water is 0.790 atm. Calculate the Henrys law constant for N2 in units of mol/L atm for Henrys law in the form C = kP, where C is the gas concentration in mol/L. Calculate the solubility of N2 in water when the partial pressure of nitrogen above water is 1.10 atm at 0C.
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Equal numbers of moles of two soluble, substances, substance A and substance B, are placed into separate 1.0-L samples of water. a The water samples are cooled. Sample A freezes at 0.50C, and Sample B freezes at l.00C. Explain how the solutions can have different freezing points. b You pour 500 mL of the solution containing substance B into a different beaker. How would the freezing point of this 500-mL portion of solution B compare to the freezing point of the 1.0-L sample of solution A? c Calculate the molality of the solutions of A and B. Assume that i = 1 for substance A. d If you were to add an additional 1.0 kg of water to solution B, what would be the new freezing point of the solution? Try to write an answer to this question without using a mathematical formula. e What concentration (molality) of substances A and B would result in both solutions having a freezing point of 0.25C? f Compare the boiling points, vapor pressure, and osmotic pressure of the original solutions of A and B. Dont perform the calculations; just state which is the greater in each ease.
In some regions of the southwest United States, the water is very hard. For example, in Las Cruces, New Mexico, the tap water contains about 560 g of dissolved solids per milliliter. Reverse osmosis units are marketed in this area to soften water. A typical unit exerts a pressure of 8.0 atm and can produce 45 L water per day. a. Assuming all of the dissolved solids are MgCO3 and assuming a temperature of 27C, what total volume of water must be processed to produce 45 L pure water? b. Would the same system work for purifying seawater? (Assume seawater is 0.60 M NaCl.)
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