Question 1

What is the molar solubility of CaF2 (Ksp = 3.9 × 10 − 11)?

Accepted Answer

A)  6.24 × 10 − 6 M 
B)  4.41 × 10 − 6 M 
C)  2.14 × 10 − 4 M 
D)  9.27 × 10 − 5 M 
A)  6.24 × 10 − 6 M 
B)  4.41 × 10 − 6 M 
C)  2.14 × 10 − 4 M 
D)  9.27 × 10 − 5 M

Question 2

What change in the reaction direction occurs if dilute NaOH is added to a H2PO41- solution?
H2PO4 1−  + H2O   HPO42 −  + H3O+

Accepted Answer

A)  shifts to the right 
B)  shifts to the left 
C)  no change in the reaction 
D)  there is insufficient information to solve this problem 
A)  shifts to the right 
B)  shifts to the left 
C)  no change in the reaction 
D)  there is insufficient information to solve this problem

Question 3

"Insoluble" salts are actually "sparingly" soluble with equilibrium expressions noted as Ka

Accepted Answer

A) True 
 B)False

Question 4

Which of the following solids will provide the greatest concentration of Cl1 −  ions if one mole of the salt is placed in one liter of deionized water?

Accepted Answer

A)  AgCl( s )   Ag1+( aq ) + Cl1 − ( aq ) Ksp = 1.8 × 10 − 10 
B)  PbCl2( s )   Pb2+( aq ) + 2 Cl1 − ( aq ) Ksp = 1.75 × 10 − 5 
C)  Hg2Cl2( s )   2 Hg1+( aq ) + 2 Cl1 − ( aq ) Ksp = 1.1 × 10 − 18 
D)  NaCl( s ) → Na1+( aq ) + Cl1 − ( aq ) 
A)  AgCl( s )   Ag1+( aq ) + Cl1 − ( aq ) Ksp = 1.8 × 10 − 10 
B)  PbCl2( s )   Pb2+( aq ) + 2 Cl1 − ( aq ) Ksp = 1.75 × 10 − 5 
C)  Hg2Cl2( s )   2 Hg1+( aq ) + 2 Cl1 − ( aq ) Ksp = 1.1 × 10 − 18 
D)  NaCl( s ) → Na1+( aq ) + Cl1 − ( aq )

Question 5

Potassium hydrogen phthalate (KHP) concentrations can be determined through titrating samples of KHP (a monoprotic acid) with bases such as NaOH in the presence of an indicator such as phenolphthalein. The indicator is colorless in an acidic solution and turns pink in an alkaline solution. Thus we can establish an equilibrium for the phenolphthalein as such:
HIn + H2O   In −  + H3O+ 
If the HIn species is the "acid color" or clear for the phenolphthalein and the In −  species is the "base color" or pink for this particular indicator, what color will appear in a flask in which a 0.2993 gram sample of KHP has been totaled neutralized with an excess of NaOH?

Accepted Answer

A)  the flask is colorless 
B)  the flask is pink 
C)  the flask is white from KCl precipitation 
D)  there is insufficient information to solve this problem 
A)  the flask is colorless 
B)  the flask is pink 
C)  the flask is white from KCl precipitation 
D)  there is insufficient information to solve this problem

Question 6

Hydrogen is produced industrially by reacting propane and liquid water:
C3H8( g ) + 3 H2O( l ) → 3 CO( g ) + 7 H2( g ) 
If the denominator of the equilibrium expression is expressed as: [C3H8]m[ H2O]n, what are the values of "m" and "n"?

Accepted Answer

A)  3, 7 
B)  1, 0 
C)  1, 3 
D)  7, 3 
A)  3, 7 
B)  1, 0 
C)  1, 3 
D)  7, 3

Question 7

The reaction: 2 A( s ) + B( g )   2 C( s ) represents a(n):

Accepted Answer

A)  homogeneous equilibrium 
B)  heterogeneous equilibrium 
C)  instantaneous equilibrium 
D)  reaction that will not come to an equilibrium 
A)  homogeneous equilibrium 
B)  heterogeneous equilibrium 
C)  instantaneous equilibrium 
D)  reaction that will not come to an equilibrium

Question 8

Which of following species is a Brønsted-Lowry acid?

Accepted Answer

A)  NaOH 
B)  C4H10 
C)  CaCl2 
D)  H2SO4 
A)  NaOH 
B)  C4H10 
C)  CaCl2 
D)  H2SO4

Question 9

What is the pH of a 0.200 M solution of HNO3?

Accepted Answer

A)  0.70 
B)  1.31 
C)  6.18 
D)  8.53 
A)  0.70 
B)  1.31 
C)  6.18 
D)  8.53

Question 10

Unlike traditional concrete, engineered cementitious composites (ECC) do not contain gravel but instead comtain fly ash.

Accepted Answer

A) True 
 B)False

Question 11

What is the molar solubility of AgCl (Ksp = 1.8 × 10 − 10)?

Accepted Answer

A)  7.31 × 10 − 5 M 
B)  5.13 × 10 − 6 M 
C)  3.84 × 10 − 5 M 
D)  1.34 × 10 − 5 M 
A)  7.31 × 10 − 5 M 
B)  5.13 × 10 − 6 M 
C)  3.84 × 10 − 5 M 
D)  1.34 × 10 − 5 M

Question 12

The production of ammonia N2( g ) + 3 H2( g )   2 NH3( g ) represents a(n):

Accepted Answer

A)  homogeneous equilibrium 
B)  heterogeneous equilibrium 
C)  instantaneous equilibrium 
D)  reaction that will not come to an equilibrium 
A)  homogeneous equilibrium 
B)  heterogeneous equilibrium 
C)  instantaneous equilibrium 
D)  reaction that will not come to an equilibrium

Question 13

The higher the Ksp of the salt, the less soluble the salt.

Accepted Answer

A) True 
 B)False

Question 14

In a dynamic equilibrium the rates of the forward and reverse reactions go to zero once the equilibrium is reached.

Accepted Answer

A) True 
 B)False

Question 15

The conjugate base of ammonium chloride is:

Accepted Answer

A)  NH3 
B)  HNO2 
C)  HCl 
D)  HNO3 
A)  NH3 
B)  HNO2 
C)  HCl 
D)  HNO3

Question 16

In a dynamic equilibrium:

Accepted Answer

A)  the rate of the forward reaction goes to zero 
B)  the rate of the forward and reverse reactions go to zero 
C)  the rates of the forward and reverse reactions become equal 
D)  the reaction begins to favor the reverse direction 
A)  the rate of the forward reaction goes to zero 
B)  the rate of the forward and reverse reactions go to zero 
C)  the rates of the forward and reverse reactions become equal 
D)  the reaction begins to favor the reverse direction

Question 17

Consider the solubility of BaSO4. If Ba(NO3)2 is added to the solution, the solubility of the barium sulfate:

Accepted Answer

A)  is unaffected 
B)  is moot because barium sulfate is a strong electrolyte 
C)  decreases 
D)  increases 
A)  is unaffected 
B)  is moot because barium sulfate is a strong electrolyte 
C)  decreases 
D)  increases

Question 18

What is the pH of a 0.0250 M pyridine solution? (Kb = 1.5 × 10 − 9)?

Accepted Answer

A)  8.79 
B)  5.21 
C)  13.1 
D)  4.72 
A)  8.79 
B)  5.21 
C)  13.1 
D)  4.72

Question 19

Products appear in the numerator of the reaction quotient

Accepted Answer

A) True 
 B)False

Question 20

Which of following species is a Brønsted-Lowry base?

Accepted Answer

A)  NaOH 
B)  C4H10 
C)  CaCl2 
D)  H2SO4 
A)  NaOH 
B)  C4H10 
C)  CaCl2 
D)  H2SO4

What is the molar solubility of CaF₂ (K_sp = 3.9 × 10^{− 11})?

What change in the reaction direction occurs if dilute NaOH is added to a H₂PO₄^1- solution? H₂PO₄¹⁻ + H₂O HPO₄^{2 −} + H₃O⁺

"Insoluble" salts are actually "sparingly" soluble with equilibrium expressions noted as K_a

Which of the following solids will provide the greatest concentration of Cl^{1 −} ions if one mole of the salt is placed in one liter of deionized water?

Hydrogen is produced industrially by reacting propane and liquid water: C₃H₈( g ) + 3 H₂O( l ) → 3 CO( g ) + 7 H₂( g ) If the denominator of the equilibrium expression is expressed as: [C₃H₈]^m[ H₂O]ⁿ, what are the values of "m" and "n"?

The reaction: 2 A( s ) + B( g ) 2 C( s ) represents a(n):

Which of following species is a Brønsted-Lowry acid?

What is the pH of a 0.200 M solution of HNO₃?

Unlike traditional concrete, engineered cementitious composites (ECC) do not contain gravel but instead comtain fly ash.

What is the molar solubility of AgCl (K_sp = 1.8 × 10^{− 10})?

The production of ammonia N₂( g ) + 3 H₂( g ) 2 NH₃( g ) represents a(n):

The higher the K_sp of the salt, the less soluble the salt.

In a dynamic equilibrium the rates of the forward and reverse reactions go to zero once the equilibrium is reached.

The conjugate base of ammonium chloride is:

In a dynamic equilibrium:

Consider the solubility of BaSO₄. If Ba(NO₃)₂ is added to the solution, the solubility of the barium sulfate:

What is the pH of a 0.0250 M pyridine solution? (K_b = 1.5 × 10^{− 9})?

Products appear in the numerator of the reaction quotient

Which of following species is a Brønsted-Lowry base?

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Exam 12: Chemical Equilibrium

What is the molar solubility of CaF2 (Ksp = 3.9 × 10 − 11)?

What change in the reaction direction occurs if dilute NaOH is added to a H2PO41- solution? H2PO4 1− + H2O HPO42 − + H3O+

"Insoluble" salts are actually "sparingly" soluble with equilibrium expressions noted as Ka

Which of the following solids will provide the greatest concentration of Cl1 − ions if one mole of the salt is placed in one liter of deionized water?

Hydrogen is produced industrially by reacting propane and liquid water: C3H8( g ) + 3 H2O( l ) → 3 CO( g ) + 7 H2( g ) If the denominator of the equilibrium expression is expressed as: [C3H8]m[ H2O]n, what are the values of "m" and "n"?

The reaction: 2 A( s ) + B( g ) 2 C( s ) represents a(n):

Which of following species is a Brønsted-Lowry acid?

What is the pH of a 0.200 M solution of HNO3?

Unlike traditional concrete, engineered cementitious composites (ECC) do not contain gravel but instead comtain fly ash.

What is the molar solubility of AgCl (Ksp = 1.8 × 10 − 10)?

The production of ammonia N2( g ) + 3 H2( g ) 2 NH3( g ) represents a(n):

The higher the Ksp of the salt, the less soluble the salt.

In a dynamic equilibrium the rates of the forward and reverse reactions go to zero once the equilibrium is reached.

The conjugate base of ammonium chloride is:

In a dynamic equilibrium:

Consider the solubility of BaSO4. If Ba(NO3)2 is added to the solution, the solubility of the barium sulfate:

What is the pH of a 0.0250 M pyridine solution? (Kb = 1.5 × 10 − 9)?

Products appear in the numerator of the reaction quotient

Which of following species is a Brønsted-Lowry base?

Introduction to Chemistry

Atoms and Molecules

Molecules Moles Chemical Equations

Stoichiometry

Gases

The Periodic Table and Atomic Structure

Chemical Bonding and Molecular Structure

Molecules and Materials

Energy and Chemistry

Entropy and the Second Law of Thermodynamics

Chemical Kinetics

Electrochemistry

Filters

What is the molar solubility of CaF₂ (K_sp = 3.9 × 10^{− 11})?

What change in the reaction direction occurs if dilute NaOH is added to a H₂PO₄^1- solution? H₂PO₄¹⁻ + H₂O HPO₄^{2 −} + H₃O⁺

"Insoluble" salts are actually "sparingly" soluble with equilibrium expressions noted as K_a

Which of the following solids will provide the greatest concentration of Cl^{1 −} ions if one mole of the salt is placed in one liter of deionized water?

Hydrogen is produced industrially by reacting propane and liquid water: C₃H₈( g ) + 3 H₂O( l ) → 3 CO( g ) + 7 H₂( g ) If the denominator of the equilibrium expression is expressed as: [C₃H₈]^m[ H₂O]ⁿ, what are the values of "m" and "n"?

What is the pH of a 0.200 M solution of HNO₃?

What is the molar solubility of AgCl (K_sp = 1.8 × 10^{− 10})?

The production of ammonia N₂( g ) + 3 H₂( g ) 2 NH₃( g ) represents a(n):

The higher the K_sp of the salt, the less soluble the salt.

Consider the solubility of BaSO₄. If Ba(NO₃)₂ is added to the solution, the solubility of the barium sulfate:

What is the pH of a 0.0250 M pyridine solution? (K_b = 1.5 × 10^{− 9})?