Physical Science: Chemistry, Book L

Chapter 3: Substances, Mixtures, and Solubility

Substances, Mixtures, and Solubility

1.
Air contains 78 percent nitrogen, 21 percent oxygen, and one percent argon. Which gas is the solvent?
A)oxygen
B)
C)
D)none of the above
2.
A solid solute that comes back out of solution is called a(n) _________ .
A)suspension
B)aqueous
C)solvent
D)precipitate
3.
__________ is the maximum amount of a solute that can be dissolved in a given amount of solvent at a given temperature.
A)Concentration
B)Polarity
C)Solubility
D)Supersaturation
4.
__________ compounds are formed from atoms covalently bonded.
A)Heterogeneous
B)Ionic
C)Molecular
D)Elemental
5.
__________ are substances that can accept positively charged H+ ions.
A)Solutes
B)Acids
C)Hydroniums
D)Bases
6.
A mixture that appears to have the same composition, color, and density and is mixed at the molecular level is called a(n) __________.
A)element
B)suspension
C)solution
D)heterogeneous mixture
7.
__________ are substances that release positively charged hydrogen ions, H+.
A)Bases
B)Solutes
C)Acids
D)Solvents
8.
__________ is the interaction that occurs between acids and bases in which the properties of each are canceled out by the other.
A)Indication
B)Balancing
C)Neutralization
D)Dissolution
9.
Stir 500 g of cesium chloride into 200 g of water at 20°C. If 127 g sink to the bottom of the container, what is the solubility of cesium chloride in water at 20°C?
A)127
B)186.5
C)286.5
D)373
10.
Matter that has fixed composition is a __________.
A)mixture
B)substance
C)solid
D)solution
11.
A solution having which of the following pH values is the most acidic?
A)14
B)7
C)5
D)1
12.
A mixture in which the substances are not mixed evenly is called __________.
A)homogeneous
B)precipitated
C)a solution
D)heterogeneous
13.
Which of the following statements is true?
A)Nonpolar solvents are useful for dissolving polar solutes.
B)Nonpolar solvents are not useful because they do not form solutions with water.
C)Polar solvents are useful for dissolving nonpolar solutes.
D)Nonpolar solvents are useful for dissolving nonpolar solutes.
14.
A(n) __________ is the substance being dissolved in a solution.
A)substrate
B)solute
C)solvent
D)insolvent
15.
__________ are combinations of substances that can be separated by physical processes.
A)Compounds
B)Mixtures
C)Atoms
D)Elements
16.
Which of the following is a compound?
A)blood
B)brass
C)air
D)water
17.
Sterling silver contains 92.5 percent silver and 7.5 percent copper. Which substance is the solute?
A)platinum
B)Solids do not form solutions.
C)copper
D)silver
18.
A solution in which water is the solvent is called a(n) __________ solution.
A)aqueous
B)heterogeneous
C)saturated
D)nonpolar
19.
The process for separating air is called __________ .
A)homogenization
B)precipitation
C)emulsification
D)fractionation
20.
Which of the following is a solution?
A)chlorine
B)milk
C)salt water
D)muddy water
21.
A(n) __________ is made of two or more elements chemically combined in fixed ratios.
A)mixture
B)solution
C)atom
D)compound
22.
A solution that contains all the solute it can hold at a given temperature is __________.
A)saturated
B)unsaturated
C)supersaturated
D)soluble
23.
As the temperature of a liquid solvent increases, the amount of solute that can dissolve in it __________.
A)decreases by one degree Celsius for every milliliter of solvent
B)remains constant
C)increases
D)decreases
24.
Which of the following is formed when atoms of different elements exchange electrons?
A)ionic compounds
B)molecular compounds
C)polar solvents
D)nonpolar compounds
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