Question 1

Which is the best representation showing a sodium cation in water?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 2

Which is not a form of chlorine used to disinfect water?

Accepted Answer

A) Chlorine gas 
B) Chloroform 
C) Sodium hypochlorite 
D) Calcium hypochlorite 
A) Chlorine gas 
B) Chloroform 
C) Sodium hypochlorite 
D) Calcium hypochlorite

Question 3

Water has one of the highest specific heats of any known liquid.This means that the temperature of a water sample ________ with the input of a ________ amount of energy.

Accepted Answer

A) decreases greatly;small 
B) decreases only slightly;large 
C) increases only slightly;large 
D) increases greatly;small 
A) decreases greatly;small 
B) decreases only slightly;large 
C) increases only slightly;large 
D) increases greatly;small

Question 4

Bases are substances that increase the hydroxide ion concentration in aqueous solution.Why does ammonia (NH3),which does not contain a hydroxide group,act as a base?

Accepted Answer

A) Ammonia acts as a base only in the presence of hydroxide ion-containing compounds 
B) Ammonia molecules remove protons from water molecules,forming hydroxide ions 
C) Ammonia molecules donate protons to water molecules,forming hydroxide ions 
D) Ammonia acts as a base only in the presence of very strong acids 
A) Ammonia acts as a base only in the presence of hydroxide ion-containing compounds 
B) Ammonia molecules remove protons from water molecules,forming hydroxide ions 
C) Ammonia molecules donate protons to water molecules,forming hydroxide ions 
D) Ammonia acts as a base only in the presence of very strong acids

Question 5

What percentage of Earth's water is in the oceans?

Accepted Answer

A) 97 percent 
B) 50 percent 
C) 3 percent 
D) 0.014 percent 
A) 97 percent 
B) 50 percent 
C) 3 percent 
D) 0.014 percent

Question 6

Which compounds are not soluble in water at room temperature?

Accepted Answer

A) I and II only 
B) II and III only 
C) III and IV only 
D) I and IV only 
A) I and II only 
B) II and III only 
C) III and IV only 
D) I and IV only

Question 7

Which statement is not true?

Accepted Answer

A) In forming a solution,the solute dissolves other substances that are called solvents 
B) Water is the solvent in an aqueous solution 
C) Pure water does not conduct electricity 
D) Electrolytes dissolved in water produce a solution that can conduct electricity 
A) In forming a solution,the solute dissolves other substances that are called solvents 
B) Water is the solvent in an aqueous solution 
C) Pure water does not conduct electricity 
D) Electrolytes dissolved in water produce a solution that can conduct electricity

Question 8

When the ________ molecules of ethanol,C2H5OH,are added to water,the ethanol molecules ________.

Accepted Answer

A) nonpolar;are attracted to the nonpolar water molecules 
B) polar;form hydrogen bonds with the polar water molecules 
C) polar;form covalent bonds with the polar water molecules 
D) nonpolar;are not attracted to the polar water molecules 
A) nonpolar;are attracted to the nonpolar water molecules 
B) polar;form hydrogen bonds with the polar water molecules 
C) polar;form covalent bonds with the polar water molecules 
D) nonpolar;are not attracted to the polar water molecules

Question 9

Which of these is not a trihalomethane?

Accepted Answer

A) CHCl3 
B) CH3Cl 
C) CHF3 
D) CHBr2Cl 
A) CHCl3 
B) CH3Cl 
C) CHF3 
D) CHBr2Cl

Question 10

Which solution is acidic?

Accepted Answer

A) MOH¯ = 0.0065 M 
B) MH+ = 1.27 * 10¯9 M 
C) MH+ = 5.79 * 10¯10 M 
D) MOH¯ = 1.77 * 10¯10 M 
A) MOH¯ = 0.0065 M 
B) MH+ = 1.27 * 10¯9 M 
C) MH+ = 5.79 * 10¯10 M 
D) MOH¯ = 1.77 * 10¯10 M

Question 11

The hydronium ion concentration in a solution with pH 10 is ________ than the hydronium ion concentration in a solution with pH 13.

Accepted Answer

A) 1,000 times less 
B) 3 times greater 
C) 1,000 times greater 
D) 100 times less 
A) 1,000 times less 
B) 3 times greater 
C) 1,000 times greater 
D) 100 times less

Question 12

When dissolved in water,hydrogen bromide (HBr) forms hydrobromic acid.Determine the hydroxide ion concentration in a 4,500 mL solution containing 3.78 g hydrogen bromide;K = 1.00 * 10¯14.

Accepted Answer

A) [OH¯] = 9.63 * 10-13 M 
B) [OH¯] = 2.14 *10-13 M 
C) [OH¯] = 4.67 *10 10-2 M 
D) [OH¯] = 0.0104 M 
A) [OH¯] = 9.63 * 10-13 M 
B) [OH¯] = 2.14 *10-13 M 
C) [OH¯] = 4.67 *10 10-2 M 
D) [OH¯] = 0.0104 M

Question 13

Which is the best definition of specific heat?

Accepted Answer

A) The quantity of heat energy that must be absorbed to cause one gram of a liquid substance to boil 
B) The quantity of heat energy that must be absorbed to increase the temperature of one gram of a substance one degree Celsius 
C) The boiling point of a liquid substance in degrees Celsius 
D) The difference between the freezing point and the boiling point of a substance 
A) The quantity of heat energy that must be absorbed to cause one gram of a liquid substance to boil 
B) The quantity of heat energy that must be absorbed to increase the temperature of one gram of a substance one degree Celsius 
C) The boiling point of a liquid substance in degrees Celsius 
D) The difference between the freezing point and the boiling point of a substance

Question 14

Scientists predict that shells of some ocean creatures will start to dissolve after how many more years of ocean acidification?

Accepted Answer

A) 40 years 
B) 150 years 
C) 300 years 
D) 85 years 
A) 40 years 
B) 150 years 
C) 300 years 
D) 85 years

Question 15

Which compound is insoluble in water?

Accepted Answer

A) Sodium carbonate 
B) Potassium nitrate 
C) Ammonium chloride 
D) Calcium carbonate 
A) Sodium carbonate 
B) Potassium nitrate 
C) Ammonium chloride 
D) Calcium carbonate

Question 16

The world map shows the availability of safe drinking water around the world.Which statement is true?

Accepted Answer

A) In Australia,less than 75 percent of the population has access to safe drinking water 
B) In most of Africa,more than 90 percent of the population has access to clean water 
C) In Europe and Russia,more than 10 percent of the population does not have access to clean water 
D) In the United States and Canada,more than 90 percent of the population has access to clean water 
A) In Australia,less than 75 percent of the population has access to safe drinking water 
B) In most of Africa,more than 90 percent of the population has access to clean water 
C) In Europe and Russia,more than 10 percent of the population does not have access to clean water 
D) In the United States and Canada,more than 90 percent of the population has access to clean water

Question 17

Which best symbolizes the hydrogen bonding between two water molecules?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 18

A 4-L sample of water contains 80 µg of lead.What is this lead concentration,in parts per billion (ppb)?

Accepted Answer

A) 20 
B) 80 
C) 320 
D) 500 
A) 20 
B) 80 
C) 320 
D) 500

Question 19

The pH of lemon juice is approximately 2.40.At this pH,the hydronium ion concentration is closest to which concentration?

Accepted Answer

A) 2.5 * 10¯12 M 
B) 4.0 * 10¯3 M 
C) 0.38 M 
D) 5.6 * 10¯4 M 
A) 2.5 * 10¯12 M 
B) 4.0 * 10¯3 M 
C) 0.38 M 
D) 5.6 * 10¯4 M

Which is the best representation showing a sodium cation in water?

Which is not a form of chlorine used to disinfect water?

Water has one of the highest specific heats of any known liquid.This means that the temperature of a water sample with the input of a amount of energy.

Bases are substances that increase the hydroxide ion concentration in aqueous solution.Why does ammonia (NH₃),which does not contain a hydroxide group,act as a base?

What percentage of Earth's water is in the oceans?

Which compounds are not soluble in water at room temperature?

Which statement is not true?

When the molecules of ethanol,C₂H₅OH,are added to water,the ethanol molecules .

Which of these is not a trihalomethane?

Which solution is acidic?

The hydronium ion concentration in a solution with pH 10 is ________ than the hydronium ion concentration in a solution with pH 13.

When dissolved in water,hydrogen bromide (HBr) forms hydrobromic acid.Determine the hydroxide ion concentration in a 4,500 mL solution containing 3.78 g hydrogen bromide;K = 1.00 * 10¯¹⁴.

Which is the best definition of specific heat?

Scientists predict that shells of some ocean creatures will start to dissolve after how many more years of ocean acidification?

Which compound is insoluble in water?

The world map shows the availability of safe drinking water around the world.Which statement is true?

Which best symbolizes the hydrogen bonding between two water molecules?

A 4-L sample of water contains 80 µg of lead.What is this lead concentration,in parts per billion (ppb)?

The pH of lemon juice is approximately 2.40.At this pH,the hydronium ion concentration is closest to which concentration?

Portable Electronics: the Periodic Table in the Palm of Your Hand

The Air We Breathe

Radiation From the Sun

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Who Killed Drthompson a Forensic Mystery

Filters

Exam 8: Water Everywhere: A Most Precious Resource

Which is the best representation showing a sodium cation in water?

Which is not a form of chlorine used to disinfect water?

Water has one of the highest specific heats of any known liquid.This means that the temperature of a water sample ________ with the input of a ________ amount of energy.

Bases are substances that increase the hydroxide ion concentration in aqueous solution.Why does ammonia (NH3),which does not contain a hydroxide group,act as a base?

What percentage of Earth's water is in the oceans?

Which compounds are not soluble in water at room temperature?

Which statement is not true?

When the ________ molecules of ethanol,C2H5OH,are added to water,the ethanol molecules ________.

Which of these is not a trihalomethane?

Which solution is acidic?

The hydronium ion concentration in a solution with pH 10 is ________ than the hydronium ion concentration in a solution with pH 13.

When dissolved in water,hydrogen bromide (HBr) forms hydrobromic acid.Determine the hydroxide ion concentration in a 4,500 mL solution containing 3.78 g hydrogen bromide;K = 1.00 * 10¯14.

Which is the best definition of specific heat?

Scientists predict that shells of some ocean creatures will start to dissolve after how many more years of ocean acidification?

Which compound is insoluble in water?

The world map shows the availability of safe drinking water around the world.Which statement is true?

Which best symbolizes the hydrogen bonding between two water molecules?

A 4-L sample of water contains 80 µg of lead.What is this lead concentration,in parts per billion (ppb)?

The pH of lemon juice is approximately 2.40.At this pH,the hydronium ion concentration is closest to which concentration?

Portable Electronics: the Periodic Table in the Palm of Your Hand

The Air We Breathe

Radiation From the Sun

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Who Killed Drthompson a Forensic Mystery

Filters

Water has one of the highest specific heats of any known liquid.This means that the temperature of a water sample with the input of a amount of energy.

Bases are substances that increase the hydroxide ion concentration in aqueous solution.Why does ammonia (NH₃),which does not contain a hydroxide group,act as a base?

When the molecules of ethanol,C₂H₅OH,are added to water,the ethanol molecules .

When dissolved in water,hydrogen bromide (HBr) forms hydrobromic acid.Determine the hydroxide ion concentration in a 4,500 mL solution containing 3.78 g hydrogen bromide;K = 1.00 * 10¯¹⁴.