Name
_
Class
Date
Sec~on
ReVIew
Types of Mixtures
14 1
•
DIRECTIONS: Write on the line at the right of each statement the letter preceding the word or expression that best
completes the statement.
1. Which of the following is a pure substance? (a) water (b) milk (c) gasoline (d) concrete
1
2. Which of the following is a heterogeneous mixture? (a) water (b) sugar-water solution
(c) whole-wheat bread (d) sugar
2.
3. Which of the following is a homogeneous mixture? (a) water (b) sugar-water solution
(c) whole-wheat bread (d) sugar
3
4. All of the following are homogeneous mixtures except (a) sodium chloride; (b) sugar-water;
(c) gasoline; (d) salt-water.
4
5. All of the following are heterogeneous mixtures except (a) whole-wheat bread; (b) granite;
(c) tap water; (d) an oil-water mixture.
5
6. Which of the following is an electrolyte? (a) sodium chloride (b) sugar (c) water (d) glass
6
7. A molecular substance whose water solution conducts electricity is (a) sodium chloride;
(b) hydrogen chloride; (c) sugar; (d) iron.
7
8. An example of a nonelectrolyte is (a) sodium chloride; (b) hydrogen chloride; (c) sugar;
(d) potassium chloride.
8
9. A solution contains solute particles whose size is (a) less than 0.1 nm; (b) 0.1 nm to 1 nm;
(c) 1 nm to 1000 nm; (d) greater than 1000 nm.
9
10. A suspension contains solute particles whose size is (a) less than 0.1 nm; (b) 0.1 nm to 1 nm;
(c) 1 nm to 1000 nm; (d) greater than 1000 nm.
___
10
DIRECTIONS: Write on the line at the right of each statement the word or expression that best completes the
meaning when substituted for the corresponding number.
____
11
____
12·
____
13
____
14
15. Mixtures whose particles are smaller than those in heterogeneous mixtures and larger
than those in solutions are called ~
.
____
15
48
Types of Mixtures
11. A(n) ~
mixture has components that are not easily distinguishable.
12. A salt-water solution is an example of a(n) ~
13. Solutions of nonelectrolytes do not contain ~
14. A(n) ~
mixture.
.
is a homogeneous mixture of metals.
Section 14.1
HRW material copyrighted under notice appearing
earlier in this 'NQrk.
Name
_
Class
The Solution
Process
Date
_
14 2
Sect~on
ReVIew
•
DIRECTIONS: Write on the line at the right of each statement the letter preceding the word or expression that best
completes the statement.
1. Which will dissolve most rapidly? (a) sugar cubes in cold water (b) sugar cubes in hot water
(c) powdered sugar in cold water (d) powdered sugar in hot water
1
2. Which will dissolve most slowly? (a) large salt crystals in unstirred water (b) large salt crystals
in stirred water (c) small salt crystals in unstirred water (d) small salt crystals in stirred water
2
3. The solubility of a substance can be expressed as (a) grams of solute; (b) grams of solvent;
(c) grams of solute per 100 g of water; (d) grams of water per 100 g solute.
3
4. An example of a nonpolar solvent is (a) water; (b) carbon tetrachloride; (c) both of the above;
(d) none of the above.
4
5. Which of the following would be soluble in water? (a) potassium nitrate (b) silver (c) benzene
(d) carbon tetrachloride
5
6. Two substances that are immiscible are (a) water and ammonia; (b) water and ethanol;
(c) carbon tetrachloride and benzene; (d) benzene and water.
6
7. Which of the following is a solvent for both polar and nonpolar solutes? (a) water (b) carbon
tetrachloride (c) ethanol (d) benzene
7
8. Endothermic dissolving processes (a) absorb heat and have positive heats of solution;
(b) release heat and have positive heats of solution; (c) absorb heat and have negative heats of
solution; (d) release heat and have negative heats of solution ..
8
9. Which of the following values for heat of solution involves the greatest release of energy?
(a) + 12.40 kJ/mol (b) + 1.33 kJ/mol (c) - 0.01 kJ/mol (d) - 3.59 kJ/mo!.
9
10. Carbonated beverages are prepared by taking advantage of the increased solubility of gases with
(a) increased temperature (b) decreased temperature (c) increased pressure (d) decreased
pressure ..
11. A solid whose solubility decreases with increasing temperature is (a) sodium chloride;
(b) cerium sulfate; (c) potassium nitrate; (d) none of the above.
12. The solubility of a substance is 8.00 g per 100 g of water. How many grams of the substance
will dissolve in 250 g of water? (a) 3.2 g (b) 16 g (c) 20 g (d) 31 g
___
10
___
11
___
12
DIRECTIONS: Write on the line at the right of each statement the word or expression that best completes the
meaning when substituted for the corresponding number.
13. Sugar is soluble in water because sugar molecules are ~
14. Carbon tetrachloride and benzene are examples of ~
15. A solution at equilibrium is called a(n) ~
copyrighted
under notice
substances.
____
13
____
14
____
15
Section 14.2
The Solution Process
HRW material
solution.
.
appeanng
earher tn thiS work.
49