Question 1

Which of the following are properties of basic solutions?

Accepted Answer

A) They turn the dye litmus red. 
B) They taste sour. 
C) They feel slippery. 
D) They react with active metals to produce hydrogen gas. 
A) They turn the dye litmus red. 
B) They taste sour. 
C) They feel slippery. 
D) They react with active metals to produce hydrogen gas. C

Question 2

A hydrogen bond is

Accepted Answer

A) what holds the atoms of a water molecule together. 
B) a force between hydrogen atoms in adjacent water molecules. 
C) a force between a hydrogen atom of one polar molecule and another polar 
D) molecule. 
E) a force between a hydrogen atom and a metal. 
A) what holds the atoms of a water molecule together. 
B) a force between hydrogen atoms in adjacent water molecules. 
C) a force between a hydrogen atom of one polar molecule and another polar 
D) molecule. 
E) a force between a hydrogen atom and a metal. C

Question 3

The presence of solute molecules makes a solution freeze at a lower temperature than the pure solvent.

Accepted Answer

A) True 
 B)False  True

Question 4

Hydrogen bonding in water accounts for

Accepted Answer

A) water's higher than expected boiling temperature. 
B) the fact that ice floats in liquid water. 
C) the fact that snowflakes are 6-sided. 
D) All of the above. 
A) water's higher than expected boiling temperature. 
B) the fact that ice floats in liquid water. 
C) the fact that snowflakes are 6-sided. 
D) All of the above.

Question 5

Water solutions of ionic substances that conduct electricity are called

Accepted Answer

A) electrical solutions. 
B) polar solutions. 
C) electrolytes. 
D) indicators. 
A) electrical solutions. 
B) polar solutions. 
C) electrolytes. 
D) indicators.

Question 6

Which of the following solutions is likely to have a pH less than 7?

Accepted Answer

A) sodium chloride 
B) ammonia 
C) carbonic acid 
D) pure water 
A) sodium chloride 
B) ammonia 
C) carbonic acid 
D) pure water

Question 7

A solution with a pH of 2

Accepted Answer

A) is twice as acidic as one with a pH of 1. 
B) is half as acidic as a solution with a pH of 1. 
C) is ten times as acidic as a solution with a pH of 1. 
D) is one-tenth as acidic as a solution with a pH of 1. 
A) is twice as acidic as one with a pH of 1. 
B) is half as acidic as a solution with a pH of 1. 
C) is ten times as acidic as a solution with a pH of 1. 
D) is one-tenth as acidic as a solution with a pH of 1.

Question 8

A strong acid is a concentrated solution of the acid.

Accepted Answer

A) True 
 B)False

Question 9

A solution is a heterogeneous mixture of two or more substances.

Accepted Answer

A) True 
 B)False

Question 10

Water containing large amounts of Mg2+ and Ca2+ions is said to be hard because it is hard to make soap lather in the water.

Accepted Answer

A) True 
 B)False

Question 11

According to the modern definition, NH3 is

Accepted Answer

A) an acid because it contains hydrogen. 
B) a base because it can accept H+ ions from water. 
C) an acid because it raises the H+ ion concentration. 
D) a base because it lowers the pH. 
A) an acid because it contains hydrogen. 
B) a base because it can accept H+ ions from water. 
C) an acid because it raises the H+ ion concentration. 
D) a base because it lowers the pH.

Question 12

The water hardness in an area is reported as 700 ppm total dissolved solids.This is the same concentration as

Accepted Answer

A) 0.007%. 
B) 0.07%. 
C) 0.7%. 
D) 7%. 
A) 0.007%. 
B) 0.07%. 
C) 0.7%. 
D) 7%.

Question 13

A solution is saturated when no more of a solute will dissolve in a solvent.

Accepted Answer

A) True 
 B)False

Question 14

What do solutions of acids, bases, and salts have in common? They

Accepted Answer

A) are proton donors. 
B) are proton acceptors. 
C) all have a pH of less than 7. 
D) are electrolytes. 
A) are proton donors. 
B) are proton acceptors. 
C) all have a pH of less than 7. 
D) are electrolytes.

Question 15

Which of the following are properties of acidic solutions?

Accepted Answer

A) They turn the dye litmus red. 
B) They taste sour. 
C) They react with active metals to produce hydrogen gas. 
D) All of the above. 
A) They turn the dye litmus red. 
B) They taste sour. 
C) They react with active metals to produce hydrogen gas. 
D) All of the above.

Question 16

-Aqueous solutions with one mole of each solid in equal volumes of water are prepared.Which solution would have the lowest freezing point?

Accepted Answer

A) C6H12O6 
B) NaNO3 
C) CaCl2 
D) All would have the same freezing point. 
A) C6H12O6 
B) NaNO3 
C) CaCl2 
D) All would have the same freezing point.

Question 17

Cooks add a pinch of salt to water to increase its boiling point since it is known that solutions boil at a higher temperature than pure water.

Accepted Answer

A) True 
 B)False

Question 18

Air is considered to be a homogeneous mixture that is 79 percent nitrogen gas, 20 percent oxygen gas, and 1 percent all the other gases.In this mixture, nitrogen can be considered

Accepted Answer

A) a solvent. 
B) a solute. 
C) a solution. 
D) saturated. 
A) a solvent. 
B) a solute. 
C) a solution. 
D) saturated.

Question 19

When a solvent is cooled, it will dissolve

Accepted Answer

A) more solid. 
B) more gas. 
C) less gas. 
D) the same amount of solid or gas. 
A) more solid. 
B) more gas. 
C) less gas. 
D) the same amount of solid or gas.

Question 20

The solubility of a gas in water decreases as the water temperature increases.

Accepted Answer

A) True 
 B)False

Exam 11: Water and Solutions

Which of the following are properties of basic solutions?

A hydrogen bond is

The presence of solute molecules makes a solution freeze at a lower temperature than the pure solvent.

Hydrogen bonding in water accounts for

Water solutions of ionic substances that conduct electricity are called

Which of the following solutions is likely to have a pH less than 7?

A solution with a pH of 2

A strong acid is a concentrated solution of the acid.

A solution is a heterogeneous mixture of two or more substances.

Water containing large amounts of Mg2+ and Ca2+ions is said to be hard because it is hard to make soap lather in the water.

According to the modern definition, NH3 is

The water hardness in an area is reported as 700 ppm total dissolved solids.This is the same concentration as

A solution is saturated when no more of a solute will dissolve in a solvent.

What do solutions of acids, bases, and salts have in common? They

Which of the following are properties of acidic solutions?

-Aqueous solutions with one mole of each solid in equal volumes of water are prepared.Which solution would have the lowest freezing point?

Cooks add a pinch of salt to water to increase its boiling point since it is known that solutions boil at a higher temperature than pure water.

Air is considered to be a homogeneous mixture that is 79 percent nitrogen gas, 20 percent oxygen gas, and 1 percent all the other gases.In this mixture, nitrogen can be considered

When a solvent is cooled, it will dissolve

The solubility of a gas in water decreases as the water temperature increases.

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Water containing large amounts of Mg²⁺ and Ca²⁺ions is said to be hard because it is hard to make soap lather in the water.

According to the modern definition, NH₃ is