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Chapter 13: Solutions

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University Chemistry 102 Quiz on Chapter 13: Solutions, created by Laura Pepe on 10/02/2020.
Laura Pepe
Quiz by Laura Pepe, updated more than 1 year ago
Laura Pepe
Created by Laura Pepe almost 5 years ago
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Question 1

Question
The equation for molarity is
Answer
  • Moles of solute / Liter of solution
  • Moles of solute/ Moles of solution
  • Moles of solution/ Liters of solute
  • Liter of solution/ Moles of solute

Question 2

Question
Moles of a component over the total moles of the solution is known as?
Answer
  • Molality
  • Molarity
  • Mass percent
  • Mole Fraction

Question 3

Question
Mass of component/ total mass solution x 100 is mass percent.
Answer
  • True
  • False

Question 4

Question
CH3COOH is more soluble in which of these solutions?
Answer
  • H2O
  • CH3COOH

Question 5

Question
C6H6 is nonpolar and soluble in water.
Answer
  • True
  • False

Question 6

Question
What is the molarity of a solution made by dissolving 2.335 grams of H2SO4 in enough water to make 50 mL of solution?
Answer
  • .476 M
  • .764 M
  • 6.47 M
  • 7.46 M

Question 7

Question
How many mL of .200 m HCL solution are needed to obtain 0.0500 moles of HCL?
Answer
  • .250 mL
  • 250 mL
  • 4 mL
  • .400 mL

Question 8

Question
What is the mole fraction of methanol if 32.0 grams of methanol (CH3OH) is dissolved in 90 grams of water?
Answer
  • .166
  • .452
  • .998
  • 4.99

Question 9

Question
Which one of the following can be used as a solvent for hexane (C6H14)?
Answer
  • Methanol (CH3OH)
  • Benzene (C6H6)
  • Liquid ammonia
  • Water

Question 10

Question
What is the mass percent of a saline solution made by dissolving 1 mole of NaCl (mm = 58.45 g) in 1 liter of water total?
Answer
  • 5.84%
  • 5.52%
  • 5.00%
  • 11.34%

Question 11

Question
The NaCl concentration of seawater is 3.5% by mass. What is its molarity if the density of seawater is 1.025 g/mL?
Answer
  • 6.14 m
  • .614 m
  • .416 m
  • 1.46 m

Question 12

Question
Molality is the moles of solute/kg of solvent.
Answer
  • True
  • False

Question 13

Question
What is the molality of a solution made by dissolving 1.45 grams of sucrose C12H22O11 in 30 mL of water?
Answer
  • 14.1 M
  • .141 m
  • .141 M
  • 1.41 m

Question 14

Question
The density of a 45.0 mass % solution of ethanol (C2H5OH) in water is 0.873 g/mL. What is the molarity of the solution?
Answer
  • 8.53 M
  • 9.77 M
  • 15.5 M
  • 0.515 M

Question 15

Question
What is the mole fraction of HCl in a 4.50 m aqueous HCl solution?
Answer
  • 3.87
  • 0.222
  • 0.0750
  • 0.0811

Question 16

Question
What is the mass percent concentration of a saline solution prepared by dissolving 1.00 mol of Na2SO4 in 1.00 L of water?
Answer
  • 12.4%
  • 11.34%
  • 57%
  • 6%

Question 17

Question
The density at 20 ∘C of a 0.828 M solution of acetic acid in water is 1.0052 g/mL. The molar mass of acetic acid, CH3CO2H, is 60.05 g/mol. What is the molality of the solution? Molality = [blank_start]0.867[blank_end] m
Answer
  • .867

Question 18

Question
The molality of a solution prepared by dissolving 22.5 g of H2SO4 in 1.80 L of water m = [blank_start]0.127[blank_end] m
Answer
  • 0.127

Question 19

Question
The mole fraction of each component of a solution prepared by dissolving 2.05 g of nicotine, C10H14N2, in 88.0 g of CH2Cl2 XC10H14N2 , XCH2Cl2 = [blank_start]1.20×10−2[blank_end], [blank_start]0.988[blank_end]
Answer
  • 1.20×10−2
  • 0.988

Question 20

Question
The density of a 16.0 mass % solution of sulfuric acid in water is 1.1094 g/mL at 25.0 ∘C. What is the molarity of the solution?
Answer
  • 148.18 M
  • 2.12 M
  • 1.81M
  • 167.4 M

Question 21

Question
A 0.944 M solution of glucose, C6H12O6, in water, has a density of 1.0624 g/mL at 20∘C. What is the concentration of this solution in the following units? What is the mole fraction? What is the mass percent? What is the molality?
Answer
  • Mole Fraction = 1.87×10−2
  • Mole Fraction = 1.10×10−4
  • Mass Percent = 37.0 mass %
  • Mass Percent = 16.0 mass %
  • Molality = 1.06 m
  • Molality = 3.04 m

Question 22

Question
Which of the following conditions will increase the solubility of a gas?
Answer
  • Low temperature and low pressure
  • Low temperature and high pressure
  • High temperature and low pressure
  • High temperature and high pressure

Question 23

Question
Henry's law constant is 3.2×10−2mol/(L⋅atm). Find the concentration of CO2 in: A can of soda under a CO2 pressure of 2.1 atm at 25 ∘C
Answer
  • 6.7×10−2 M
  • 7.7×10−2 M
  • 5.7×10−2 M
  • 8.7×10−2 M

Question 24

Question
Henry's law constant is 3.2×10−2mol/(L⋅atm). Find the concentration of CO2 in: A can of soda open to the atmosphere at 25 ∘C (CO2 is approximately 0.04% by volume in the atmosphere.) Express your answer to two significant figures and include the appropriate units. The answer is = [blank_start]1.3×10−5[blank_end] M
Answer
  • 1.3×10−5

Question 25

Question
Colligative properties are properties that changed when a solute is added. It depends on the number of solute particles not on what the solute is.
Answer
  • True
  • False
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