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CHM 2045C: Spring Term 2008
Practice Final (Spring 1998's Test)
Module Eight

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Module Eight

Module 8 Test Masters:

Mary Alcott (maliceall@juno.com)

Juliana Allebach (Ruuufie@aol.com)

John Taylor (johtaylo@fscj.edu) [Template Author]


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 molality of a sodium carbonate solution that contains 25.0 g of Na2CO3 (106.0 g/mol) dissolved in 250.0 g of water?

a) 0.0943 m
b) 0.236 m
c) 0.943 m
d) 1.06 m
e) 10.6 m

Question 8

Calculate the freezing point lowering for a solution that contains 125 g of methanol, CH3OH, dissolved in 1.15 kg of water (Kf= 1.86oC/m)

a) 0.548oC
b) 1.82oC
c) 2.41oC
d) 3.39oC
e) 6.31oC

Question 9

Which of the following is true of a solution?

a) solute partial are ions and small molecules
b) solute particles are 1nm 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 10

What is the term for the properties of a solution that are affected by the number of solute particles?

a) colligative property
b) colloid property
c) saturated
d) supersaturated
e) unsaturated

Question 11

What is the term for a directional shift of an electron pair toward the more electornegative atom in a polar covalent bond?

a) delta plus
b) delta minus
c) dipole
d) net pole
e) none 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 each kilogram of solvent?

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

Question 14

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 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 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 19

Which of the following is not an example of a colloid?

a) shaving cream
b) air
c) milk
d) fog
e) smoke

Question 20

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 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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