Question 1

In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl2 solution:

Accepted Answer

A) the NaCl solution has the higher boiling point and the lower freezing point. 
B) the CaCl2 solution has the higher boiling point and the lower freezing point. 
C) the NaCl solution has the higher boiling point and the CaCl2 solution has the lower freezing point. 
D) the CaCl2 solution has the higher boiling point and the NaCl solution has the lower freezing point. 
E) both solutions have the same boiling point and the same freezing point.

Question 2

A 0.10 molality solution of the sugar glucose (molecular weight = 180.10 g/mol)and a 0.10 molality solution of sucrose (molecular weight = 342.34 g/mol)would both boil at the same temperature.

Accepted Answer

A) True 
 B)False

Question 3

The solubility of solids in water:

Accepted Answer

A) is independent of the temperature. 
B) increases with increasing temperature. 
C) decreases with increasing temperature. 
D) Solids are not soluble in water. 
E) none of the above

Question 4

The tragedy at Lake Nyos in Cameroon,West Africa,was caused by:

Accepted Answer

A) the release of excessive amounts of nitrogen gas that had been dissolved in the water at the bottom of the lake. 
B) the release of excessive amounts of oxygen gas that had been dissolved in the water at the bottom of the lake. 
C) the release of excessive amounts of carbon dioxide that had been dissolved in the water at the bottom of the lake. 
D) the release of excess water stored in the volcanic lake which flooded the village below. 
E) none of the above

Question 5

What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?

Accepted Answer

A) 47.8% 
B) 58.4% 
C) 32.4% 
D) The identity of the compound must be known. 
E) none of the above

Question 6

Which solution below contains the highest total quantity of dissolved sodium ions?

Accepted Answer

A) 100.mL of 4.0 M NaCl 
B) 75.0 mL of 3.0 M Na2SO4 
C) 50.0 mL of 8.0 M NaOH 
D) 50.0 mL of 2.0 M Na3PO4 
E) none of the above

Question 7

What volume of 9.00 M nitric acid is needed to make 6.50L of 1.25M solution?

Accepted Answer

A) 903 mL 
B) 1.73 L 
C) 1.10 L 
D) 748 mL 
E) none of the above

Question 8

What is the final concentration of a solution prepared by diluting 35.0 mL of 12.0 M HCl to a final volume of 1.20L ?

Accepted Answer

A) 0.504 M 
B) 3.50 M 
C) 0.420 M 
D) 0.350 M 
E) none of the above

Question 9

The terms "molarity"and "molality" are considered identical and can always be used interchangeably.

Accepted Answer

A) True 
 B)False

Question 10

How many grams of LiF would be present in 575 mL of 0.750 M LiF solution?

Accepted Answer

A) 11.2 
B) 0.0338 
C) 1.12 × 104 
D) 19.9 
E) 33.8

Question 11

Ionic solutes typically dissolve in nonpolar solvents.

Accepted Answer

A) True 
 B)False

Question 12

A sample of salt water will freeze at a higher temperature than a sample of pure water.

Accepted Answer

A) True 
 B)False

Question 13

What is the final concentration (M)of a solution prepared by diluting 50.0 mL of a 6.00 M KCI solution to a volume of 0.500 L?

Accepted Answer

A) 1.67 
B) 0.600 
C) 0.0167 
D) 3.0 
E) none of the above

Question 14

The solubility of Pb(NO3)2 is 55 grams per 100 g H2O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO3)2 is added to 100 grams of water at this temperature?

Accepted Answer

A) insoluble 
B) unsaturated 
C) saturated 
D) supersaturated 
E) none of the above

Question 15

A solution that is 13.58 percent by mass of sugar contains 13.75 grams of sugar dissolved in 87.5 grams of water.

Accepted Answer

A) True 
 B)False

Question 16

After you have completed the task of diluting a solution,which statement below must be TRUE?

Accepted Answer

A) The new solution has more volume but has a lower concentration than before. 
B) The new solution has more volume but has a higher concentration than before. 
C) The new solution has less volume but has a lower concentration than before. 
D) The new solution has less volume but has a higher concentration than before. 
E) none of the above

Question 17

What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 grams of solid into 39.5 grams of water?

Accepted Answer

A) 84.1% 
B) 72.7% 
C) 45.7% 
D) 54.3% 
E) none of the above

Question 18

How many moles of KCl are present in 95.3 mL of 2.10 M KCl?

Accepted Answer

A) 0.0500 
B) 5.00 
C) 20.0 
D) 0.200 
E) none of the above

Question 19

Why is it NOT a good idea to drink seawater when people are lost at sea?

Accepted Answer

A) The high concentration of salt forces water out of the cells lining your stomach and intestine. 
B) The osmotic pressure builds up in the cells of your intestine until they potentially rupture. 
C) The semipermeable membrane protecting your stomach is ruptured during osmosis. 
D) The seawater has fish urine in it and who wants to drink that? 
E) none of the above

Question 20

When a chunk of gold is melted and poured into the shape of an ingot,an aqueous solution of gold has been created.

Accepted Answer

A) True 
 B)False

Exam 13: Solutions

In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl₂ solution:

A 0.10 molality solution of the sugar glucose (molecular weight = 180.10 g/mol)and a 0.10 molality solution of sucrose (molecular weight = 342.34 g/mol)would both boil at the same temperature.

The solubility of solids in water:

The tragedy at Lake Nyos in Cameroon,West Africa,was caused by:

What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?

Which solution below contains the highest total quantity of dissolved sodium ions?

What volume of 9.00 M nitric acid is needed to make 6.50L of 1.25M solution?

What is the final concentration of a solution prepared by diluting 35.0 mL of 12.0 M HCl to a final volume of 1.20L ?

The terms "molarity"and "molality" are considered identical and can always be used interchangeably.

How many grams of LiF would be present in 575 mL of 0.750 M LiF solution?

Ionic solutes typically dissolve in nonpolar solvents.

A sample of salt water will freeze at a higher temperature than a sample of pure water.

What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a 6.00 M KCI solution to a volume of 0.500 L?

The solubility of Pb(NO₃) ₂ is 55 grams per 100 g H₂O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO₃) ₂ is added to 100 grams of water at this temperature?

A solution that is 13.58 percent by mass of sugar contains 13.75 grams of sugar dissolved in 87.5 grams of water.

After you have completed the task of diluting a solution,which statement below must be TRUE?

What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 grams of solid into 39.5 grams of water?

How many moles of KCl are present in 95.3 mL of 2.10 M KCl?

Why is it NOT a good idea to drink seawater when people are lost at sea?

When a chunk of gold is melted and poured into the shape of an ingot,an aqueous solution of gold has been created.

Exam 13: Solutions

In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl2 solution:

A 0.10 molality solution of the sugar glucose (molecular weight = 180.10 g/mol)and a 0.10 molality solution of sucrose (molecular weight = 342.34 g/mol)would both boil at the same temperature.

The solubility of solids in water:

The tragedy at Lake Nyos in Cameroon,West Africa,was caused by:

What is the mass percent of a solution prepared by dissolving 18.9 grams of solid into 39.5 grams of water?

Which solution below contains the highest total quantity of dissolved sodium ions?

What volume of 9.00 M nitric acid is needed to make 6.50L of 1.25M solution?

What is the final concentration of a solution prepared by diluting 35.0 mL of 12.0 M HCl to a final volume of 1.20L ?

The terms "molarity"and "molality" are considered identical and can always be used interchangeably.

How many grams of LiF would be present in 575 mL of 0.750 M LiF solution?

Ionic solutes typically dissolve in nonpolar solvents.

A sample of salt water will freeze at a higher temperature than a sample of pure water.

What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a 6.00 M KCI solution to a volume of 0.500 L?

The solubility of Pb(NO3) 2 is 55 grams per 100 g H2O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO3) 2 is added to 100 grams of water at this temperature?

A solution that is 13.58 percent by mass of sugar contains 13.75 grams of sugar dissolved in 87.5 grams of water.

After you have completed the task of diluting a solution,which statement below must be TRUE?

What is the mass percent of an ammonium carbonate solution prepared by dissolving 33.2 grams of solid into 39.5 grams of water?

How many moles of KCl are present in 95.3 mL of 2.10 M KCl?

Why is it NOT a good idea to drink seawater when people are lost at sea?

When a chunk of gold is melted and poured into the shape of an ingot,an aqueous solution of gold has been created.

In comparing a 0.25 molality aqueous NaCl solution to a 0.25 molality aqueous CaCl₂ solution:

The solubility of Pb(NO₃) ₂ is 55 grams per 100 g H₂O at 20°C.Which term would properly describe a solution where 44 grams of Pb(NO₃) ₂ is added to 100 grams of water at this temperature?