Question 1

Which of these properties of water is one which makes it such a good solvent?

Accepted Answer

A)  its boiling point 
B)  its high specific heat 
C)  its high surface tension 
D)  its hydrogen bonding ability 
A)  its boiling point 
B)  its high specific heat 
C)  its high surface tension 
D)  its hydrogen bonding ability D

Question 2

A solution is prepared by dissolving 4.40 g of KSCN in enough water to make 340. mL of solution. What is the concentration of the solution?

Accepted Answer

A)  0.0440 M 
B)  0.0543 M 
C)  0.119 M 
D)  0.133 M 
A)  0.0440 M 
B)  0.0543 M 
C)  0.119 M 
D)  0.133 M D

Question 3

A solution is prepared by dissolving 53.5 grams of ammonium chloride, NH4Cl in 4000. grams of water? What is the freezing point of this solution? [The freezing point depression constant for water is 1.86°C/mole solute in 1000g of water]

Accepted Answer

A)  -0.37°C 
B)  -0.47°C 
C)  -0.93°C 
D)  -1.86°C 
A)  -0.37°C 
B)  -0.47°C 
C)  -0.93°C 
D)  -1.86°C B

Question 4

When considering the solubility of a particular solute in a particular solvent the term "like dissolves like" generally refers to which of the following properties?

Accepted Answer

A)  formula weight 
B)  molecular polarity 
C)  both a and b 
D)  neither a nor b 
A)  formula weight 
B)  molecular polarity 
C)  both a and b 
D)  neither a nor b

Question 5

A student is preparing a sugar water solution to make rock candy. When the student continues to add sugar to the solution no additional sugar dissolves. Which kind of solution does the student have?

Accepted Answer

A)  a saturated solution 
B)  a supersaturated solution 
C)  an unsaturated solution 
D)  We cannot tell. 
A)  a saturated solution 
B)  a supersaturated solution 
C)  an unsaturated solution 
D)  We cannot tell.

Question 6

Consider the following graph.  
-Which substance exhibits solubility behavior that is similar to that of a gas?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  None of the substances listed show this behavior. 
A)  A 
B)  B 
C)  C 
D)  None of the substances listed show this behavior.

Question 7

Which of the following solutions will have the highest electrical conductivity?

Accepted Answer

A)  0.1 M NaCl 
B)  0.1 M BaCl2 
C)  0.1 M AlCl3 
D)  All have the same conductivity. 
A)  0.1 M NaCl 
B)  0.1 M BaCl2 
C)  0.1 M AlCl3 
D)  All have the same conductivity.

Question 8

Which of the following solutions will have the highest electrical conductivity?

Accepted Answer

A)  0.1 M Na3PO4 
B)  0.1 M Na2HPO4 
C)  0.1 M NaH2PO4 
D)  All have the same conductivity. 
A)  0.1 M Na3PO4 
B)  0.1 M Na2HPO4 
C)  0.1 M NaH2PO4 
D)  All have the same conductivity.

Question 9

What is the molar mass of CuSO4·5H2O?

Accepted Answer

A)  90.0 g/mol 
B)  177.6 g/mol 
C)  159.6 g/mol 
D)  249.6 g/mol 
A)  90.0 g/mol 
B)  177.6 g/mol 
C)  159.6 g/mol 
D)  249.6 g/mol

Question 10

Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion?

Accepted Answer

A)  addition of a material which has great affinity for water 
B)  addition of an electrolyte 
C)  both a and b 
D)  neither a nor b 
A)  addition of a material which has great affinity for water 
B)  addition of an electrolyte 
C)  both a and b 
D)  neither a nor b

Question 11

Water is generally a good solvent for which of the following types of compounds?

Accepted Answer

A)  ionic compounds 
B)  polar compounds 
C)  both a and b 
D)  neither a nor b 
A)  ionic compounds 
B)  polar compounds 
C)  both a and b 
D)  neither a nor b

Question 12

What is the osmolarity of a 3.3%(w/v) Na3PO4 solution?

Accepted Answer

A)  0.20 osmolar 
B)  0.40 osmolar 
C)  0.80 osmolar 
D)  1.6 osmolar 
A)  0.20 osmolar 
B)  0.40 osmolar 
C)  0.80 osmolar 
D)  1.6 osmolar

Question 13

If we wish to prepare a 0.50 M solution of NaCl, how much water must be added to 1.0 mole of NaCl?

Accepted Answer

A)  2.0 mol 
B)  2.0 L 
C)  2.0 × 103 g 
D)  Enough water to make 2.0 L of solution. 
A)  2.0 mol 
B)  2.0 L 
C)  2.0 × 103 g 
D)  Enough water to make 2.0 L of solution.

Question 14

Which of the following will have the lowest freezing point?

Accepted Answer

A)  0.1 M acetic acid, HC2H3O2 
B)  0.1 M hydrochloric acid, HCl 
C)  0.1 M hydrofluoric acid, HF 
D)  All have the same freezing point. 
A)  0.1 M acetic acid, HC2H3O2 
B)  0.1 M hydrochloric acid, HCl 
C)  0.1 M hydrofluoric acid, HF 
D)  All have the same freezing point.

Question 15

A stockroom attendant has a 15.0%(w/v) solution of KOH. What volume of this solution should she use if she needs to prepare 20.0 mL of a 10.0%(w/v) solution?

Accepted Answer

A)  6.67 mL 
B)  7.50 mL 
C)  13.3 mL 
D)  15.0 mL 
A)  6.67 mL 
B)  7.50 mL 
C)  13.3 mL 
D)  15.0 mL

Question 16

A beaker of salt water has some solid salt at the bottom? What type of solution is in the beaker?

Accepted Answer

A)  a saturated solution 
B)  a supersaturated solution 
C)  an unsaturated solution 
D)  We cannot tell. 
A)  a saturated solution 
B)  a supersaturated solution 
C)  an unsaturated solution 
D)  We cannot tell.

Question 17

A salt water solution is 3.0% (w/w). How much salt is there in a sample which weighs 250 grams?

Accepted Answer

A)  1.2 grams 
B)  1.5 grams 
C)  3.0 grams 
D)  7.5 grams 
A)  1.2 grams 
B)  1.5 grams 
C)  3.0 grams 
D)  7.5 grams

Question 18

Which laboratory equipment is needed to prepare solutions of known %(w/v)?

Accepted Answer

A)  a balance 
B)  a volumetric flask 
C)  both a and b 
D)  Neither a nor b 
A)  a balance 
B)  a volumetric flask 
C)  both a and b 
D)  Neither a nor b

Question 19

Which of the following is a solution?

Accepted Answer

A)  blood plasma 
B)  cigarette smoke 
C)  milk 
D)  none of these 
A)  blood plasma 
B)  cigarette smoke 
C)  milk 
D)  none of these

Question 20

Consider the following graph.  
-Which substance is the most soluble in 100 mL of water at 10 °C?

Accepted Answer

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

Exam 6: Solutions and Colloids

Which of these properties of water is one which makes it such a good solvent?

A solution is prepared by dissolving 4.40 g of KSCN in enough water to make 340. mL of solution. What is the concentration of the solution?

A solution is prepared by dissolving 53.5 grams of ammonium chloride, NH4Cl in 4000. grams of water? What is the freezing point of this solution? [The freezing point depression constant for water is 1.86°C/mole solute in 1000g of water]

When considering the solubility of a particular solute in a particular solvent the term "like dissolves like" generally refers to which of the following properties?

A student is preparing a sugar water solution to make rock candy. When the student continues to add sugar to the solution no additional sugar dissolves. Which kind of solution does the student have?

Consider the following graph. -Which substance exhibits solubility behavior that is similar to that of a gas?

Which of the following solutions will have the highest electrical conductivity?

Which of the following solutions will have the highest electrical conductivity?

What is the molar mass of CuSO4·5H2O?

Which of the following techniques can be used to decrease the stability of an aqueous colloidal dispersion?

Water is generally a good solvent for which of the following types of compounds?

What is the osmolarity of a 3.3%(w/v) Na3PO4 solution?

If we wish to prepare a 0.50 M solution of NaCl, how much water must be added to 1.0 mole of NaCl?

Which of the following will have the lowest freezing point?

A stockroom attendant has a 15.0%(w/v) solution of KOH. What volume of this solution should she use if she needs to prepare 20.0 mL of a 10.0%(w/v) solution?

A beaker of salt water has some solid salt at the bottom? What type of solution is in the beaker?

A salt water solution is 3.0% (w/w). How much salt is there in a sample which weighs 250 grams?

Which laboratory equipment is needed to prepare solutions of known %(w/v)?

Which of the following is a solution?

Consider the following graph. -Which substance is the most soluble in 100 mL of water at 10 °C?

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A solution is prepared by dissolving 53.5 grams of ammonium chloride, NH₄Cl in 4000. grams of water? What is the freezing point of this solution? [The freezing point depression constant for water is 1.86°C/mole solute in 1000g of water]

What is the molar mass of CuSO₄·5H₂O?

What is the osmolarity of a 3.3%(w/v) Na₃PO₄ solution?