Focus On Physical Science: California Grade 8

Chapter 9: Acids and Bases in Solution

Standard Assessment

1.
__________ is the interaction that occurs between acids and bases in which the properties of each are canceled out by the other. 5.e
A)Indication
B)Neutralization
C)Dissolution
D)Balancing
2.
Which of the following is a solution? 7.c
A)muddy water
B)milk
C)salt water
D)chlorine
3.
A mixture in which the substances are not mixed evenly is called __________. 7.c
A)a solution
B)homogeneous
C)precipitated
D)heterogeneous
4.
When salt dissolves in water, it has changed __________. 7.c
A)density
B)shape
C)state
D)form
5.
A(n) __________ is the substance being dissolved in a solution. 7.c
A)insolvent
B)solvent
C)solute
D)substrate
6.
__________ are substances that can accept positively charged H+ ions. 5.e
A)Acids
B)Bases
C)Hydroniums
D)Solutes
7.
__________ are combinations of substances that can be separated by physical processes. 7.c
A)Mixtures
B)Elements
C)Compounds
D)Atoms
8.
Which of the following contains polar bonds? 7.c
A)magnesium chloride
B)sodium fluoride
C)nitrogen molecules
D)water molecules
9.
__________ is the maximum amount of a solute that can be dissolved in a given amount of solvent at a given temperature. 7.c
A)Concentration
B)Supersaturation
C)Solubility
D)Polarity
10.
Which of the following is formed when atoms of different elements exchange electrons? 7.c
A)polar solvents
B)ionic compounds
C)nonpolar compounds
D)molecular compounds
11.
Sterling silver contains 92.5 percent silver and 7.5 percent copper. Which substance is the solute? 7.c
A)copper
B)silver
C)platinum
D)Solids do not form solutions.
12.
A mixture that appears to have the same composition, color, and density and is mixed at the molecular level is called a(n) __________. 7.c
A)solution
B)element
C)suspension
D)heterogeneous mixture
13.
A solution having which of the following pH values is the most acidic? 5.e
A)5
B)1
C)7
D)14
14.
__________ are substances that release positively charged hydrogen ions, H+. 5.e
A)Solutes
B)Bases
C)Solvents
D)Acids
15.
As the temperature of a liquid solvent increases, the amount of solute that can dissolve in it __________. 7.c
A)remains constant
B)decreases
C)increases
D)decreases by one degree Celsius for every milliliter of solvent
16.
Air contains 78 percent nitrogen, 21 percent oxygen, and one percent argon. Which gas is the solvent? 7.c
A)oxygen
B)nitrogen
C)argon
D)none of the above
17.
A solution that contains all the solute it can hold at a given temperature is __________. 7.c
A)supersaturated
B)unsaturated
C)saturated
D)soluble
18.
A solution in which water is the solvent is called a(n) __________ solution. 7.c
A)heterogeneous
B)nonpolar
C)aqueous
D)saturated
19.
A(n) __________ is made of two or more elements chemically combined in fixed ratios. 7.c
A)mixture
B)atom
C)solution
D)compound
20.
A(n) __________ is a bond in which electrons are shared unequally. 7.c
A)ionic
B)nonpolar
C)polar bond
D)intermediate
Grade 8
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