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CHM 1025C: Spring Term 2008
On-Line PreFinal Module 8
Chapters 14, 15, 17

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Final Exam: Module 8

Final Exam Quiz Masters:

Mary Tassin (MTassin002@lsua.edu) [Text Input]

John Taylor (johtaylo@fscj.edu) [Consultant]


Multiple Choice [One Answer Only]

Question 1

Coca-Cola (R) is carbonated by injecting Coke with carbon dioxide gas. Under what conditions is the solubility of carbon dioxide gas the greatest?

a) low temperature, low pressure
b) low temperature, high pressure
c) low temperature, pressure is not a factor
d) high pressure, temperature is not a factor
e) high temperature, high pressure

Question 2

Which of the following illustrates the like dissolves like rule for two liquids?

a) a polar solute is soluble in a nonpolar solvent
b) a polar solute is insoluble in a polar solvent
c) a nonpolar solute is soluble in a nonpolar solvent
d) a nonpolar solute is soluble in a polar solvent
e) none of the above

Question 3

Which of the following increases the rate of dissolving for a solid solute in a solvent?

a) grinding the solute
b) heating the solution
c) stirring the solution
d) all of the above
e) none of the above

Question 4

Why does grinding the solute increase the rate of solubility of a solid substance in water?
a) smaller particles have more surface area for the solvent to attack
b) smaller particles have more movement in solution
c) smaller particles have a lower density
d) smaller particles are less polar
e) smaller particles are more polar

Question 5

Which of the following is not a unit factor related to a 15.0% aqueous solution of potassium iodide, KI?

a) 15.0 g KI / 85.0 g water
b) 85.0 g water / 100.0 g solution
c) 85.0 g water / 15.0 g KI
d) 100.0 g solution / 85.0 g water
e) 15.0 g KI / 100.0 g water

Question 6

What is the molarity of a sucrose solution that contains 10.0 g of C12H22O11 (342.0 g/mol) dissolved in 100.0 mL of solution?

a) 0.00292 M
b) 0.0292 M
c) 0.292 M
d) 3.42 M
e) 34.2 M

Question 7

What is the term for a liquid composed of nonpolar molecules?

a) molecular solvent
b) nonpolar solvent
c) polar solvent
d) solvent
e) none of the above

Question 8

What is the molar concentration of water molecules in a beaker of water?

(Recall that the density of water is 1.00 g/mL).

a) 0.0555 M
b) 1.00 M
c) 18.0 M
d) 55.5 M
e) 18,000 M

Question 9

What concentration expression relates the mass of solute in grams dissolved in each 100 grams of solution?

a) mass/mass percent ( m/m%)
b) molarity (M)
c) molality (m)
d) normality (N)
e) parts per million (ppm)

Question 10

What is the term that refers to the maximum amount of a given solute that dissolves in a solvent at a specified temperature?

a) colloid
b) concentrated
c) unsaturated
d) solubility
e) supersaturated

Question 11

Which of the following is true of a solution?

a) solute partial are ions and small molecules
b) solute particles are 1 nm or less in diameter
c) solute particles do not settle upon standing
d) solute particles pass through semipermeable membranes
e) all of the above

Question 12

What concentration expression relates the mass of solute in grams dissolved in each 100 grams of solution?

a) mass/mass percent ( m/m%)
b) molarity (M)
c) molality (m)
d) normality (N)
e) parts per million (ppm)

Question 13

What concentration expression relates the moles of solute dissolved in one liter of solution?

a) mass/mass percent ( m/m%)
b) molality (m)
c) molarity (M)
d) normality (N)
e) parts per million (ppm)

Question 14

How many milliliters of 3.00 M sulfuric acid contain 9.80 g of H2SO4 (98.0 g/mol)?

a) 0.300 mL
b) 30.0 mL
c) 33.3 mL
d) 333 mL
e) 3,330 mL

Question 15

What is the term that refers to the maximum amount of a given solute that dissolves in a solvent at a specified temperature?

a) colloid
b) concentrated
c) saturated
d) solubility
e) supersaturated

Question 16

What is the term for the component of a solution that is the lesser quality?

a) miscible
b) soluble
c) solvent
d) solute
e) unsaturated

Question 17

What is the term for a solution that contains more solute than is ordinarily soluble at a given temperature?

a) colloid
b) concentrated
c) saturated
d) supersaturated
e) unsaturated

Question 18

What is the molar hydrogen ion concentration of stomach acid that registers a pH of 2 on a strip of pH paper?

a) 0.2 M
b) 0.01 M
c) 0.2 M
d) 0.1 M
e) 2 M

Question 19

Which of the following terms expresses the [OH-] on an exponential scale?
a) pH or pOH
b) pH or -log [H+]
c) pH or -log [OH-]
d) pOH or -log [H+]
e) pOH or -log [OH-]

Question 20

What is the molar hydrogen ion concentration of an aqueous acid solution having a pH of zero?

a) 0 M
b) 0.1 M
c) 1 M
d) 10 M
d) none of these

Question 21

Write a balanced net ionic equation for the following reaction:
HC2H3O2(aq)    +     KOH (aq)    ---->    KC2H3O2(aq)    +     H2O(1)

a) H+(aq) + OH-(aq) -> H2O(1)
b) C2H3O2-(aq) + K+(aq) -> KC2H3O2(aq)
c) H+(aq) + KOH (aq) -> K+ (aq) + H2 O(1)
d) HC2H3O2(aq) + OH-(aq) -> C2H3O-2(aq) + H2O(1)
e) HC2H3O2(aq) + K+(aq) + OH-(aq) -> K+(aq) + C2H3O2(aq) + H2O (1)

Question 22

What is the term for a substance that causes the oxidation of another substance in a redox reaction?
a) anode
b) cathode
c) oxidizing agent
d) reducing agent
e) none of the above

Question 23

What is the term for a process characterized by the gain of electrons?
a) electrochemistry
b) oxidation
c) redox
d) reduction
e) none of the above

Question 24

In order for an ionic redox reaction to be balanced, what quantities must be equal on the reactants and products side of the equation?
a) electron gain must equal electron loss
b) atoms of each reactant element must equal atoms of products
c) total ionic charge for the reactants must equal total for the products
d) all of the above
e) none of the above

Question 25

After balancing the following redox reaction, what is the coefficient of H+?

MnO-4(aq)    +     SO2(g)     +     H2O (1)    ---->      Mn2+(aq)    +      SO4²-(aq)    +      H+(aq)

a) 1
b) 2
c) 4
d) 6
e) none of the above

Question 26

After balancing the following redox reaction in basic solution, what is the coefficient of OH-?

( add HOH and OH-1ions as needed) MnO-4(aq)    +     SO32-    ---->    MnO2(aq)     +     SO42-(aq)

a) 1
b) 2
c) 3
d) 6
e) none of the above

Question 27

What substance is the oxidizing agent in the following redox reaction?

2HgCl2(aq)    +     Sn2+(aq)    ---->     Sn4+(aq)     +     Hg2Cl2(s)    +     2 Cl-(aq)

a) HgCl2
b) Sn2+
c) Sn4+
d) Hg2Cl2
e) Cl-
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