48 notecards = 12 pages (4 cards per page)
1) In a single molecule of water, two hydrogen atoms are bonded to a
single oxygen atom by _____.
C) polar covalent bonds
2) The partial negative charge at one end of a water molecule is
attracted to the partial positive charge of another water molecule.
What is this attraction called?
C) an ionic bond
3) The partial negative charge in a molecule of water occurs because
4) Sulfur is in the same column of the periodic table as oxygen, but
has electronegativity similar to carbon. Compared to water molecules,
molecules of H2S will _____.
C) have a higher capacity to absorb heat for the same change in temperature D) not form hydrogen bonds with each other
5) Water molecules can form hydrogen bonds with _____.
A) compounds that have polar covalent bonds
D) chloride ions
6) Which of the following is a property of liquid water? Liquid water _____.
A) is less dense than ice
7) Which of the following can be attributed to water's high specific heat?
A) Oil and water do not mix well.
D) Sugar dissolves in hot tea faster than in iced tea.
8) The cities of Portland, Oregon, and Minneapolis, Minnesota, are at
about the same latitude, but Minneapolis has much hotter summers and
much colder winters than Portland. Why?
C) Fresh water is more likely to freeze than salt water.
9) To act as an effective coolant in a car's radiator, a substance
has to have the capacity to absorb a great deal of heat. You have a
reference book with tables listing the physical properties of many
liquids. In choosing a coolant for your car, which table would you
B) density at room temperature C) heat of vaporization
10) Water has many exceptional and useful properties. Which is the
rarest property among compounds?
C) Water has a high heat capacity.
11) Which of the following effects can occur because of the high
surface tension of water? A) Lakes cannot freeze solid in winter,
despite low temperatures.
D) Sweat can evaporate from the skin, helping to keep people from overheating.
12) Which of the following takes place as an ice cube cools a
13) A dietary Calorie equals 1 kilocalorie. Which of the following
statements correctly defines 1 kilocalorie? One kilocalorie equals
B) 10,000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°F
C) 1000 calories, or the amount of heat required to raise the temperature of 1 kg of water by 1°C
D) 1000 calories, or the amount of heat required to raise the temperature of 100 g of water by 100°C
14) Which type of bond must be broken for water to vaporize?
A) ionic bonds
D) both polar covalent bonds and hydrogen bonds
15) Why does ice float in liquid water?
16) Hydrophobic substances such as vegetable oil are _____.
17) One mole (mol) of glucose (molecular mass = 180 daltons) is _____.
A) 180 × 1023 molecules of glucose
C) 180 kilograms of glucose
18) When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e.g., glucose, sucrose, glycerol) do not generally dissociate when placed in aqueous solution. Which of the following solutions would be expected to contain the greatest number of solute particles (molecules or ions)?
A) 1 liter of 0.5 M NaCl
19) The molar mass of glucose is 180 grams per mole (g/mol). Which of
the following procedures should you carry out to make a 1 M solution
of glucose? Into 0.8 liter (L) of water, dissolve _____.
20) You have a freshly prepared 0.1 M glucose solution. Each liter of this solution contains how many glucose molecules?
A) 6.02 × 1023
B) 3.01 × 1023
C) 6.02 × 1024
D) 6.02 × 1022
22) One mole of the compound above would weigh how many grams? (Note: The atomic masses, in daltons, are approximately 12 for carbon, 1 for hydrogen, and 16 for oxygen.)
23) How many grams of the compound in the figure above are required
to make 1 liter of a 0.5 M solution? (Note: The atomic masses, in
daltons, are approximately 12 for carbon, 1 for hydrogen, and 16 for
25) You have two beakers. One contains pure water, the other contains pure methanol (wood alcohol). The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. You pour crystals of table salt (NaCl) into each beaker. Predict what will happen.
A) Equal amounts of NaCl crystals will dissolve in both water and
D) NaCl crystals will dissolve readily in methanol but will not dissolve in water.
26) Rank, from low to high, the pH of blood, stomach acid, and urine.
A) blood, urine, and stomach acid
D) stomach acid, urine, blood
27) A solution with a pH of 5 has how many more protons in it than a solution with a pH of 7?
A) 5 times
D) 1000 times
28) Consider the following reaction at equilibrium: What would be the effect of adding additional H2CO3?
A) It would drive the equilibrium dynamics to the right.
D) The amounts of CO2 and H2O would decrease.
29) A strong acid like HCl _____.
C) reacts with strong bases to create a buffered solution
D) is a strong buffer at low pH
30) Which of the following dissociates completely in solution and is
considered to be a strong base (alkali)?
31) A 0.01 M solution of a substance has a pH of 2. What can you
conclude about this substance?
C) It is a weak acid.
32) A solution contains 0.0000001 (10-7) moles of hydroxyl ions [OH-] per liter. Which of the following best describes this solution?
A) acidic: H+ acceptor
B) basic: H+ acceptor
C) acidic: H+ donor
33) What is the pH of a solution with a hydroxyl ion (OH-)
concentration of 10-12 M? A) pH 2
D) pH 12
34) Which of the following solutions would require the addition of
the greatest amount of base to bring the solution to neutral pH?
C) black coffee at pH 5
35) What is the hydrogen ion (H+) concentration of a solution of pH 8?
A) 8 M
B) 8 x 10-6 M
C) 10-8 M
D) 10-6 M
36) If the pH of a solution is decreased from 9 to 8, it means that
the concentration of _____. A) H+ has decreased to one-tenth (1/10)
what it was at pH 9
D) OH- has increased tenfold (10X) compared to what it was at pH 9
37) One liter of a solution of pH 2 has how many more hydrogen ions
(H+) than 1 liter of a solution of pH 6?
C) 10,000 times more
38) Which of the following statements is true about buffer
39) One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted above.
If the pH of blood drops, one would expect _____.
D) the HCO3- to act as an acid and remove excess H+ by the formation of H2CO3
40) One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted below.
If the pH of blood increases, one would expect _____.
D) an increase in the concentration of HCO3- and a decrease in the concentration of OH-
41) Assume that acid rain has lowered the pH of a particular lake to pH 4.0. What is the hydroxide ion concentration of this lake?
A) 1 × 10-10 mol of hydroxide ions per liter of lake water
B) 1 × 10-4 mol of hydroxide ions per liter of lake water
C) 4.0 M with regard to hydroxide ion concentration
D) 4.0 × 10-4 mol of hydroxide ions per liter of lake water
42) Consider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we can reasonably conclude that _____.
A) solution Y has no free hydrogen ions (H+)
43) A beaker contains 100 milliliters (mL) of NaOH solution at pH =
13. A technician carefully pours into the beaker 10 mL of HCl at pH =
1. Which of the following statements correctly describes the result of
B) The pH of the beaker's contents will increase.
C) The pH of the beaker's contents will be neutral.
D) The pH of the beaker's contents will decrease.
44) Increased atmospheric CO2 concentrations might have what effect on seawater?
A) Seawater will become more alkaline, and carbonate concentrations
C) Seawater will become more acidic, and carbonate concentrations
45) How would acidification of seawater affect marine organisms?
Acidification of seawater would _____.
B) decrease dissolved carbonate concentrations and promote faster
growth of corals and shell- building animals
D) decrease dissolved carbonate concentrations and hinder growth of corals and shell-building animals
46) One idea to mitigate the effects of burning fossil fuels on atmospheric CO2 concentrations is to pipe liquid CO2 into the ocean at depths of 2500 feet or greater. At the high pressures at such depths, CO2 is heavier than water. What potential effects might result from implementing such a scheme?
A) increased carbonate concentrations in the deep waters
C) no effect because carbon dioxide is not soluble in water
47) If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the
concentration of H+ ions _____.
B) is 10 times higher in the mitochondrial matrix than in the cytoplasm
C) in the cytoplasm is 7/8 the concentration in the mitochondrial matrix
D) in the cytoplasm is 8/7 the concentration in the mitochondrial matrix
49) The loss of water from a plant by transpiration cools the leaf. Movement of water in transpiration requires both adhesion to the conducting walls and wood fibers of the plant and cohesion of the molecules to each other. A scientist wanted to increase the rate of transpiration of a crop species to extend its range into warmer climates. The scientist substituted a nonpolar solution with an atomic mass similar to that of water for hydrating the plants. What do you expect the scientist’s data will indicate from this experiment?
A) The rate of transpiration will be the same for both water and
the nonpolar substance.
50) In living systems molecules involved in hydrogen bonding almost
always contain either oxygen or nitrogen or both. How do you explain
C) Oxygen and nitrogen are elements found in fats and