## Chapter 3

Last update by Smcdonald1 on 09/18/2014
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# The molecular mass of glucose (C6H12O6) is 180 g. Which of the following proceduresshould youcarry out to make a 0.5 M solution of glucose?A) Dissolve 0.5 g of glucose in a small volume of water, and then add more water until the totalvolume of solution is 1 L.B) Dissolve 90 g of glucose in a small volume of water, and then add more water until the totalvolume of the solution is 1 L.C) Dissolve 180 g of glucose in a small volume of water, and then add more water until the totalvolume of the solution is 1 L.D) Dissolve 0.5 g of glucose in 1 L of water.E) Dissolve 180 g of glucose in 1 Lof water.

B) Dissolve 90 g of glucose in a small volume of water, and then add more water until the totalvolume of the solution is 1 L.

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You have a freshly-prepared 0.1M solution of glucose in water. Each liter of this solutioncontains how many glucose molecules?

A) 6.02 × 1023

B) 3.01 × 1023

C) 6.02 × 1024

D) 12.04 × 1023

E) 6.02 × 1022

C) 6.02 × 1024

The molecular weight of water is 18 daltons. What is the molarity of 1 liter of pure water?

A) 55.6M

B) 18M

C) 37M

D) 0.66M

E) 1.0M

A) 55.6M

You have a freshly-prepared 1M solution of glucose in water. You carefully pour out a 100mL sample of that solution. How many glucose molecules are included in that 100 mL sample?

A) 6.02 × 1023

B) 3.01 × 1023

C) 6.02 × 1024

D) 12.04 × 1023

E) 6.02 × 1

C) 6.02 × 1024

A given solution contains 0.0001(10) moles of hydrogen ions [H] per liter. Which of thefollowing best describes this solution?

A) acidic: H+acceptor

B) basic: H+acceptor

C) acidic: H+donor

D) basic: H+donor

E) neutral

C) acidic: H+donor

What is the pH of a solution with a hydroxyl ion [OH-] concentration of 10-12M?

A) pH 2

B) pH 4

C) pH 10

D) pH 12

E) pH 14

A) pH 2

What is the pH of a solution with a hydrogen ion [H+] concentration of 10-8M?

A) pH 2

B) pH 4

C) pH 6

D) pH 8

E) pH 10

D) pH 8

Which of the following statements about water is correct?

A) Water is more dense as a solid than it is as a liquid

B) Water is less dense as ice than it is as liquid

C) Water is a good solvent for lipids

D) Compared to most other substances, the temperature of water rises sharply when is absorbs heat

E) Compared to most liquids, the evaporation of water requires very little heat

B) Water is less dense as a solid

If the pH of a solution is decreased from 9 to 8, it means that the

A) concentration of H+has decreased to one-tenth (1/10) what it was at pH 9.

B) concentration of H+has increased 10-fold (10X) compared towhat it was at pH 9.

C) concentration of OH-has increased 10-fold (10X) compared to what it was at pH 9.

D) concentration of OH-has decreased to one-tenth (1/10) what it was at pH 9.

E) Both B and D are correct.

E) Both B and D are correct.

If the pH of a solution is increased from pH 5 to pH 7, it means that the

A) concentration of H+is twice (2X) what it was at pH 5.

B) concentration of H+is half (1/2) what it was at pH 5.

C) concentration of OH-is 100 times greater than what it was at pH 5.

D) concentration of OH-is one-hundredth (0.01X) what it was at pH 5.

E) concentration of H+is 100 times greater and the concentration of OH-is one-hundredth what

they were at pH 5.

C) concentration of OH-is 100 times greater than what it was at pH 5.

One liter of a solution of pH 2 has how many more hydrogen ions (H) than 1 L of a solutionof pH 6?

A) 4 times more

B) 400 times more

C) 4,000 times more

D) 10,000 times more

E) 100,000 times more

D) 10,000 times more

One liter of a solution pH 9 has how many more hydroxyl ions (OH-) than 1 L of a solutionof pH 4?

A) 5 times more

B) 100 times more

C) 1,000 times more

D) 10,000 times more

E) 100,000 times more

E) 100,000 times more
Chapter 3
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