Question 1

What is the molarity of a solution prepared by dissolving 0.750 mol CaCl2 in enough water to make 0.500 L of solution?

Accepted Answer

A) 0.375 M 
B) 0.667 M 
C) 1.50 M 
D) 83.2 M 
E) 166.5 M 
A) 0.375 M 
B) 0.667 M 
C) 1.50 M 
D) 83.2 M 
E) 166.5 M

Question 2

Match the following.
-weak electrolyte

Accepted Answer

A) a solution in which more solute can be dissolved 
B) the shrinking of a red blood cell when placed in a solution of greater osmolarity than the cell itself 
C) refers to a solution having a greater osmolarity than 0.30 Osmol,the osmolarity of normal red blood cells 
D) refers to two solutions having the same osmolarity 
E) a substance which dissociates completely in solution,providing a relatively large number of ions to conduct electricity
F)an ionic compound which holds water molecules within its crystalline structure
G)a substance which partially dissociates in solution,providing a relatively small number of ions to conduct electricity
H)the swelling and bursting of a red blood cell when placed in a solution of lower osmolarity than the cell itself
I)an ionic compound which attracts water molecules from the atmosphere
J)a solution in which more solute is dissolved than predicted for that particular temperature
K)a substance which does not dissociate in solution and therefore does not conduct electricity
L)a solution in which no more solute will dissolve and in which excess solute is visible in the container
M)refers to a solution having a lower osmolarity than 30.0 Osmol,the osmolarity of blood serum 
A) a solution in which more solute can be dissolved 
B) the shrinking of a red blood cell when placed in a solution of greater osmolarity than the cell itself 
C) refers to a solution having a greater osmolarity than 0.30 Osmol,the osmolarity of normal red blood cells 
D) refers to two solutions having the same osmolarity 
E) a substance which dissociates completely in solution,providing a relatively large number of ions to conduct electricity
F)an ionic compound which holds water molecules within its crystalline structure
G)a substance which partially dissociates in solution,providing a relatively small number of ions to conduct electricity
H)the swelling and bursting of a red blood cell when placed in a solution of lower osmolarity than the cell itself
I)an ionic compound which attracts water molecules from the atmosphere
J)a solution in which more solute is dissolved than predicted for that particular temperature
K)a substance which does not dissociate in solution and therefore does not conduct electricity
L)a solution in which no more solute will dissolve and in which excess solute is visible in the container
M)refers to a solution having a lower osmolarity than 30.0 Osmol,the osmolarity of blood serum

Question 3

If a normal blood sample contains 4.5 mEq/L of calcium ion,how many mg of calcium are contained in a 25.0 mL blood sample?

Accepted Answer

A) 9.0 mg 
B) 5.6 mg 
C) 2.8 mg 
D) 2.3 mg 
E) 1.4 mg 
A) 9.0 mg 
B) 5.6 mg 
C) 2.8 mg 
D) 2.3 mg 
E) 1.4 mg

Question 4

How much NaCl is present in 25.0 mL of a 12.0% (w/v)solution?

Accepted Answer

A) 3.00 g 
B) 4.00 g 
C) 6.00 g 
D) 12.0 g 
E) 48.0 g 
A) 3.00 g 
B) 4.00 g 
C) 6.00 g 
D) 12.0 g 
E) 48.0 g

Question 5

How much NaOH is present in a 250.mL sample of a 5.00% (w/v)solution?

Accepted Answer

A) 5.00 g 
B) 10.0 g 
C) 12.5 g 
D) 25.0 g 
E) 250 g 
A) 5.00 g 
B) 10.0 g 
C) 12.5 g 
D) 25.0 g 
E) 250 g

Question 6

Which list includes all the pieces of lab equipment needed to prepare a 0.500 M solution of NaCl from the pure salt and water?

Accepted Answer

A) buret; volumetric flask 
B) buret; electronic balance 
C) electronic balance; volumetric flask 
D) electronic balance; graduated cylinder 
E) volumetric pipet and bulb; volumetric flask 
A) buret; volumetric flask 
B) buret; electronic balance 
C) electronic balance; volumetric flask 
D) electronic balance; graduated cylinder 
E) volumetric pipet and bulb; volumetric flask

Question 7

How much NaCl is present in a 15.0 mL sample of a 12.0% (w/v)solution?

Accepted Answer

A) 1.80 g 
B) 12.0 g 
C) 15.0 g 
D) 0.800 g 
E) 1.25 g 
A) 1.80 g 
B) 12.0 g 
C) 15.0 g 
D) 0.800 g 
E) 1.25 g

Question 8

How many mL of a 5.00% (w/v)glucose solution are needed to provide 20.0 g of glucose?

Accepted Answer

A) 5.00 mL 
B) 20.0 mL 
C) 4.00 mL 
D) 200.mL 
E) 400.mL 
A) 5.00 mL 
B) 20.0 mL 
C) 4.00 mL 
D) 200.mL 
E) 400.mL

Question 9

How many milliequivalents of chloride ion are contained in a sample that is determined to contain 0.725 g of chloride ion?

Accepted Answer

A) 48.9 mEq 
B) 41.0 mEq 
C) 25.7 mEq 
D) 20.5 mEq 
E) 10.3 mEq 
A) 48.9 mEq 
B) 41.0 mEq 
C) 25.7 mEq 
D) 20.5 mEq 
E) 10.3 mEq

Question 10

The solubility of nitrogen in water exposed to the atmosphere,where the partial pressure of nitrogen is 593 mm,is 5.3 × 10-4 M.At the same temperature,what would be the solubility of pure nitrogen,at a pressure of 760 mm?

Accepted Answer

A) 4.1 × 10-4 M 
B) 6.8 × 10-4 M 
C) 1500 M 
D) 2400 M 
E) none of the above 
A) 4.1 × 10-4 M 
B) 6.8 × 10-4 M 
C) 1500 M 
D) 2400 M 
E) none of the above

Question 11

The dissolving process is exothermic when

Accepted Answer

A) the energy released in solvation exceeds the energy used in breaking up solute-solute and solvent-solvent interactions. 
B) the energy used in solvation exceeds the energy released in breaking up solute-solute and solvent-solvent interactions. 
C) the energy released in solvation is about the same as the energy used in breaking up solute-solute and solvent-solvent interactions. 
D) the energy used in solvation is less than the energy released in breaking up solute-solute and solvent-solvent interactions. 
E) the energy used in solvation is about the same as the energy released in breaking up solute-solute and solvent-solvent interactions. 
A) the energy released in solvation exceeds the energy used in breaking up solute-solute and solvent-solvent interactions. 
B) the energy used in solvation exceeds the energy released in breaking up solute-solute and solvent-solvent interactions. 
C) the energy released in solvation is about the same as the energy used in breaking up solute-solute and solvent-solvent interactions. 
D) the energy used in solvation is less than the energy released in breaking up solute-solute and solvent-solvent interactions. 
E) the energy used in solvation is about the same as the energy released in breaking up solute-solute and solvent-solvent interactions.

Question 12

How many moles of HCl are present in 75.0 mL of a 0.200 M solution?

Accepted Answer

A) 15.0 mol 
B) 2.67 mol 
C) 0.375 mol 
D) 0.275 mol 
E) 0.0150 mol 
A) 15.0 mol 
B) 2.67 mol 
C) 0.375 mol 
D) 0.275 mol 
E) 0.0150 mol

Question 13

What is the % (w/v)concentration of a solution containing 12 grams of solute in 400 mL of solution?

Accepted Answer

A) 1.2% 
B) 3.0% 
C) 4.0% 
D) 6.0% 
E) 12% 
A) 1.2% 
B) 3.0% 
C) 4.0% 
D) 6.0% 
E) 12%

Question 14

Match the following.
-hypertonic

Accepted Answer

A) a solution in which more solute can be dissolved 
B) the shrinking of a red blood cell when placed in a solution of greater osmolarity than the cell itself 
C) refers to a solution having a greater osmolarity than 0.30 Osmol,the osmolarity of normal red blood cells 
D) refers to two solutions having the same osmolarity 
E) a substance which dissociates completely in solution,providing a relatively large number of ions to conduct electricity
F)an ionic compound which holds water molecules within its crystalline structure
G)a substance which partially dissociates in solution,providing a relatively small number of ions to conduct electricity
H)the swelling and bursting of a red blood cell when placed in a solution of lower osmolarity than the cell itself
I)an ionic compound which attracts water molecules from the atmosphere
J)a solution in which more solute is dissolved than predicted for that particular temperature
K)a substance which does not dissociate in solution and therefore does not conduct electricity
L)a solution in which no more solute will dissolve and in which excess solute is visible in the container
M)refers to a solution having a lower osmolarity than 30.0 Osmol,the osmolarity of blood serum 
A) a solution in which more solute can be dissolved 
B) the shrinking of a red blood cell when placed in a solution of greater osmolarity than the cell itself 
C) refers to a solution having a greater osmolarity than 0.30 Osmol,the osmolarity of normal red blood cells 
D) refers to two solutions having the same osmolarity 
E) a substance which dissociates completely in solution,providing a relatively large number of ions to conduct electricity
F)an ionic compound which holds water molecules within its crystalline structure
G)a substance which partially dissociates in solution,providing a relatively small number of ions to conduct electricity
H)the swelling and bursting of a red blood cell when placed in a solution of lower osmolarity than the cell itself
I)an ionic compound which attracts water molecules from the atmosphere
J)a solution in which more solute is dissolved than predicted for that particular temperature
K)a substance which does not dissociate in solution and therefore does not conduct electricity
L)a solution in which no more solute will dissolve and in which excess solute is visible in the container
M)refers to a solution having a lower osmolarity than 30.0 Osmol,the osmolarity of blood serum

Question 15

How much NaCl is needed to make 75 mL of a 12% (w/v)solution?

Accepted Answer

A) 30 g 
B) 6.0 g 
C) 7.5 g 
D) 9.0 g 
E) 12 g 
A) 30 g 
B) 6.0 g 
C) 7.5 g 
D) 9.0 g 
E) 12 g

Question 16

Which statement comparing solutions with pure solvents is not correct?

Accepted Answer

A) A solution containing a non-volatile solute has a lower vapor pressure than pure solvent. 
B) A solution containing a non-volatile solute has a lower boiling point than pure solvent. 
C) A solution containing a non-volatile solute has a lower freezing point than pure solvent. 
D) A solution will have a greater mass than an equal volume of pure solvent if the solute has a molar mass greater than the solvent. 
E) none of the above 
A) A solution containing a non-volatile solute has a lower vapor pressure than pure solvent. 
B) A solution containing a non-volatile solute has a lower boiling point than pure solvent. 
C) A solution containing a non-volatile solute has a lower freezing point than pure solvent. 
D) A solution will have a greater mass than an equal volume of pure solvent if the solute has a molar mass greater than the solvent. 
E) none of the above

Question 17

How many grams are in 10.0 mEq of Ca2+?

Accepted Answer

A) 0.201 g 
B) 40.1 g 
C) 20.1 g 
D) 0.802 g 
E) 0.401 g 
A) 0.201 g 
B) 40.1 g 
C) 20.1 g 
D) 0.802 g 
E) 0.401 g

Question 18

What is the % (w/v)concentration of a solution containing 25.0 g of solute in 400.mL of solution?

Accepted Answer

A) 2.50% 
B) 5.00% 
C) 6.25% 
D) 12.5% 
E) 25.0% 
A) 2.50% 
B) 5.00% 
C) 6.25% 
D) 12.5% 
E) 25.0%

Question 19

Match the following.
-saturated

Accepted Answer

A) a solution in which more solute can be dissolved 
B) the shrinking of a red blood cell when placed in a solution of greater osmolarity than the cell itself 
C) refers to a solution having a greater osmolarity than 0.30 Osmol,the osmolarity of normal red blood cells 
D) refers to two solutions having the same osmolarity 
E) a substance which dissociates completely in solution,providing a relatively large number of ions to conduct electricity
F)an ionic compound which holds water molecules within its crystalline structure
G)a substance which partially dissociates in solution,providing a relatively small number of ions to conduct electricity
H)the swelling and bursting of a red blood cell when placed in a solution of lower osmolarity than the cell itself
I)an ionic compound which attracts water molecules from the atmosphere
J)a solution in which more solute is dissolved than predicted for that particular temperature
K)a substance which does not dissociate in solution and therefore does not conduct electricity
L)a solution in which no more solute will dissolve and in which excess solute is visible in the container
M)refers to a solution having a lower osmolarity than 30.0 Osmol,the osmolarity of blood serum 
A) a solution in which more solute can be dissolved 
B) the shrinking of a red blood cell when placed in a solution of greater osmolarity than the cell itself 
C) refers to a solution having a greater osmolarity than 0.30 Osmol,the osmolarity of normal red blood cells 
D) refers to two solutions having the same osmolarity 
E) a substance which dissociates completely in solution,providing a relatively large number of ions to conduct electricity
F)an ionic compound which holds water molecules within its crystalline structure
G)a substance which partially dissociates in solution,providing a relatively small number of ions to conduct electricity
H)the swelling and bursting of a red blood cell when placed in a solution of lower osmolarity than the cell itself
I)an ionic compound which attracts water molecules from the atmosphere
J)a solution in which more solute is dissolved than predicted for that particular temperature
K)a substance which does not dissociate in solution and therefore does not conduct electricity
L)a solution in which no more solute will dissolve and in which excess solute is visible in the container
M)refers to a solution having a lower osmolarity than 30.0 Osmol,the osmolarity of blood serum

Question 20

When a solid dissolves,each molecule is removed from the crystal by interaction with the solvent.This process of surrounding each ion with solvent molecules is called

Accepted Answer

A) dilution. 
B) solvation. 
C) electrolysis. 
D) hemolysis. 
E) crenation. 
A) dilution. 
B) solvation. 
C) electrolysis. 
D) hemolysis. 
E) crenation.

Exam 9: Solutions

What is the molarity of a solution prepared by dissolving 0.750 mol CaCl2 in enough water to make 0.500 L of solution?

Match the following. -weak electrolyte

If a normal blood sample contains 4.5 mEq/L of calcium ion,how many mg of calcium are contained in a 25.0 mL blood sample?

How much NaCl is present in 25.0 mL of a 12.0% (w/v)solution?

How much NaOH is present in a 250.mL sample of a 5.00% (w/v)solution?

Which list includes all the pieces of lab equipment needed to prepare a 0.500 M solution of NaCl from the pure salt and water?

How much NaCl is present in a 15.0 mL sample of a 12.0% (w/v)solution?

How many mL of a 5.00% (w/v)glucose solution are needed to provide 20.0 g of glucose?

How many milliequivalents of chloride ion are contained in a sample that is determined to contain 0.725 g of chloride ion?

The solubility of nitrogen in water exposed to the atmosphere,where the partial pressure of nitrogen is 593 mm,is 5.3 × 10-4 M.At the same temperature,what would be the solubility of pure nitrogen,at a pressure of 760 mm?

The dissolving process is exothermic when

How many moles of HCl are present in 75.0 mL of a 0.200 M solution?

What is the % (w/v)concentration of a solution containing 12 grams of solute in 400 mL of solution?

Match the following. -hypertonic

How much NaCl is needed to make 75 mL of a 12% (w/v)solution?

Which statement comparing solutions with pure solvents is not correct?

How many grams are in 10.0 mEq of Ca2+?

What is the % (w/v)concentration of a solution containing 25.0 g of solute in 400.mL of solution?

Match the following. -saturated

When a solid dissolves,each molecule is removed from the crystal by interaction with the solvent.This process of surrounding each ion with solvent molecules is called

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What is the molarity of a solution prepared by dissolving 0.750 mol CaCl₂ in enough water to make 0.500 L of solution?

The solubility of nitrogen in water exposed to the atmosphere,where the partial pressure of nitrogen is 593 mm,is 5.3 × 10^-4 M.At the same temperature,what would be the solubility of pure nitrogen,at a pressure of 760 mm?

How many grams are in 10.0 mEq of Ca²⁺?