Question 1

The pH of 0.10 M solution and 0.35 M solution of NaHCO3(aq)must differ for each solution.

Accepted Answer

A) True 
 B)False

Question 2

The amino acid alanine, HOOC-CH(CH3)NH3+,Has Ka1 = 4.5 *10-3 and Ka2 = 1.4 * 10-10.Calculate $\alpha$(HOOC-CH(CH3)NH3+)At pH 3.

Accepted Answer

A)  0 
B)  0.82 
C)  0.58 
D)  0.29 
E)  0.18 
A)  0 
B)  0.82 
C)  0.58 
D)  0.29 
E)  0.18

Question 3

The following 0.1 M aqueous solutions are arranged in order of increasing pH, with the highest pH on the far right. $$\begin{array} { | l | l | l | l | l | } 
\hline \mathrm { HNO } _ { 3 } & \mathrm { HCOOH } & & \mathrm { KBr } & \mathrm { KNO } _ { 2 } \
\hline
\end{array}$$
Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

Accepted Answer

A)  NaHSO4  
B)  KF 
C)  HNO2  
D)  CH3NH2  
E)  (CH3)3NHCl 
A)  NaHSO4  
B)  KF 
C)  HNO2  
D)  CH3NH2  
E)  (CH3)3NHCl

Question 4

For a solution labeled "0.10 M H2SO4(aq),"

Accepted Answer

A)  [HSO4-] is greater than 0.10 M. 
B)  the pH is less than 1.0. 
C)  [SO42-] = 0.10 M. 
D)  the pH equals 1.0. 
E)  the pH is greater than 1.0. 
A)  [HSO4-] is greater than 0.10 M. 
B)  the pH is less than 1.0. 
C)  [SO42-] = 0.10 M. 
D)  the pH equals 1.0. 
E)  the pH is greater than 1.0.

Question 5

The pH of 0.10 M pyridine(aq) is 9.13.What is the value of Kb for pyridine?

Accepted Answer

A)  2.7 * 10-4  
B)  7.4 * 10-10  
C)  2.7 * 10-5  
D)  1.8 * 10-10  
E)  1.8 * 10-9  
A)  2.7 * 10-4  
B)  7.4 * 10-10  
C)  2.7 * 10-5  
D)  1.8 * 10-10  
E)  1.8 * 10-9

Question 6

Which of the following occurs when HCl(aq), Cu(s),And Fe(s)Are mixed under standard conditions?

Accepted Answer

A)  O2(g) is formed. 
B)  Cu(s) dissolves. 
C)  Cl2(g) is formed. 
D)  No reaction takes place. 
E)  Fe(s) dissolves. 
A)  O2(g) is formed. 
B)  Cu(s) dissolves. 
C)  Cl2(g) is formed. 
D)  No reaction takes place. 
E)  Fe(s) dissolves.

Question 7

For a solution labeled "0.10 M H2SO3(aq)," pKa1 = 1.81 and pKa2 = 6.91, which of the following is true?

Accepted Answer

A)  [H+] = 0.2 M. 
B)  The pH is 1.0. 
C)  The pH ~1.5. 
D)  The pH is 0.70. 
E)  The pH ~ 4.4. 
A)  [H+] = 0.2 M. 
B)  The pH is 1.0. 
C)  The pH ~1.5. 
D)  The pH is 0.70. 
E)  The pH ~ 4.4.

Question 8

Consider the following cell:
Zn(s)|Zn2+(aq,0.200 M)M H+(aq,?)|H2(g,1.00 atm)|Pt
If E = +0.66 V and E$\omicron$10 = +0.76 V at 25$\omicron$C,
Calculate the concentration of H+ in the cathode cell compartment.

Accepted Answer

A)  2.1 *10-2 M 
B)  4.0 * 10-1 M 
C)  8.4 * 10-5 M 
D)  9.2 * 10-3 M 
E)  4.0 * 10-3 M 
A)  2.1 *10-2 M 
B)  4.0 * 10-1 M 
C)  8.4 * 10-5 M 
D)  9.2 * 10-3 M 
E)  4.0 * 10-3 M

Question 9

What is the molarity of OH- in a 0.0018 M calcium hydroxide solution?

Accepted Answer

A)  0.0009 M 
B)  0.0036 M 
C)  0.0018 M 
D)  0.0072 M 
E)  None of the above. 
A)  0.0009 M 
B)  0.0036 M 
C)  0.0018 M 
D)  0.0072 M 
E)  None of the above.

Question 10

Which species will reduce Ag+ but not Fe2+?

Accepted Answer

A)  Pt 
B)  Au 
C)  V 
D)  Cr 
E)  H2  
A)  Pt 
B)  Au 
C)  V 
D)  Cr 
E)  H2

Question 11

Which of the following water-insoluble salts is more soluble in 1.0 M HClO4(aq)?

Accepted Answer

A)  AgBr 
B)  PbF2 
C)  Hg2Br2  
D)  PbI2  
E)  AgClO4 
A)  AgBr 
B)  PbF2 
C)  Hg2Br2  
D)  PbI2  
E)  AgClO4

Question 12

Which pair of metals will dissolve in nitric acid?

Accepted Answer

A)  Pt, Ag 
B)  Pt, Au 
C)  Ag, Fe 
D)  Ag, Au 
E)  Pt, Fe 
A)  Pt, Ag 
B)  Pt, Au 
C)  Ag, Fe 
D)  Ag, Au 
E)  Pt, Fe

Question 13

The titration curve for the titration of 0.100 M Na2CO3(aq) with 0.100 M HClO4(aq)
Is:   
Estimate pKb1.

Accepted Answer

A)  8.5 
B)  6.4 
C)  3.7 
D)  10.3 
E)  7.6 
A)  8.5 
B)  6.4 
C)  3.7 
D)  10.3 
E)  7.6

Question 14

Which of the following occurs when HNO3(aq), Cu(s), And Pt(s)Are mixed under standard conditions?

Accepted Answer

A)  Pt(s) dissolves. 
B)  No reaction takes place. 
C)  Cu(s) dissolves. 
D)  Pt(s) dissolves and H2(g) is formed. 
E)  Cu(s) dissolves and H2(g) is formed. 
A)  Pt(s) dissolves. 
B)  No reaction takes place. 
C)  Cu(s) dissolves. 
D)  Pt(s) dissolves and H2(g) is formed. 
E)  Cu(s) dissolves and H2(g) is formed.

Question 15

If the pKa of acetic acid is 4.75, the pKa of CH3CH2OH is

Accepted Answer

A)  about 4. 
B)  much less than 4.75. 
C)  about 16. 
D)  also 4.75. 
E)  about 7. 
A)  about 4. 
B)  much less than 4.75. 
C)  about 16. 
D)  also 4.75. 
E)  about 7.

Question 16

How many moles of KOH(s)must be added to 1.00 L of 0.782 M HF(aq)to produce a buffer with a pH = 4.00?

Accepted Answer

The answer of How many moles of KOH(s)must be added...

Question 17

The amino acid methionine, HOOC-CH(CH2CH2SCH3)NH3+,Has pKa1 = 2.2 and pKa2 = 9.1.If this amino acid is represented by H2L+,The major species at pH 6 is

Accepted Answer

A)  HL 
B)  H2L+ 
C)  L- 
D)  HL and L- 
A)  HL 
B)  H2L+ 
C)  L- 
D)  HL and L-

Question 18

What is the conjugate base of H2PO4- ?

Accepted Answer

A)  HPO42- 
B)  OH- 
C)  H3PO4 
D)  H2PO4- 
E)  PO43- 
A)  HPO42- 
B)  OH- 
C)  H3PO4 
D)  H2PO4- 
E)  PO43-

Question 19

If E$\omicron$for the following cell is 0.36 V at 25$\omicron$C
Pb(s)|PbSO4(s)|SO42-(aq,0.60 M)M H+(aq,0.70 M)|H2(g,192.5 kPa)|Pt
How is the Nernst equation for the cell properly expressed at this temperature?

Accepted Answer

A)  E = 0.36 - 0.01285ln[1.90/{(0.70)2(0.60)}] 
B)  E = 0.36 - 0.02569ln[192.5/{(0.70)2(0.60)}] 
C)  E = 0.36 + 0.01285ln[192.5/{(0.70)2(0.60)}] 
D)  E = 0.36 + 0.01285ln[1.90/{(0.70)2(0.60)}] 
E)  E = 0.36 -0.01285ln[1.90/{(0.70)(0.60)}] 
A)  E = 0.36 - 0.01285ln[1.90/{(0.70)2(0.60)}] 
B)  E = 0.36 - 0.02569ln[192.5/{(0.70)2(0.60)}] 
C)  E = 0.36 + 0.01285ln[192.5/{(0.70)2(0.60)}] 
D)  E = 0.36 + 0.01285ln[1.90/{(0.70)2(0.60)}] 
E)  E = 0.36 -0.01285ln[1.90/{(0.70)(0.60)}]

Question 20

Calculate the ratio of the molarities of CO32- and HCO3-ions required to achieve buffering at pH = 9.0 .For H2CO3,PKa1 = 6.37,And pKa2 = 10.00.

Accepted Answer

A)  0.50 
B)  3.16 
C)  1.65 
D)  0.32 
E)  0.61 
A)  0.50 
B)  3.16 
C)  1.65 
D)  0.32 
E)  0.61

The pH of 0.10 M solution and 0.35 M solution of NaHCO₃(aq)must differ for each solution.

The amino acid alanine, HOOC-CH(CH₃)NH₃⁺,Has K_a1 = 4.5 10^-³ and K_a2 = 1.4 10^-¹⁰.Calculate $\alpha$ (HOOC-CH(CH₃)NH₃⁺)At pH 3.

The following 0.1 M aqueous solutions are arranged in order of increasing pH, with the highest pH on the far right. Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

For a solution labeled "0.10 M H₂SO₄(aq),"

The pH of 0.10 M pyridine(aq) is 9.13.What is the value of K_bfor pyridine?

Which of the following occurs when HCl(aq), Cu(s),And Fe(s)Are mixed under standard conditions?

For a solution labeled "0.10 M H₂SO₃(aq)," pK_a1 = 1.81 and pK_a2 = 6.91, which of the following is true?

Consider the following cell: Zn(s)|Zn²⁺(aq,0.200 M)M H⁺(aq,?)|H₂(g,1.00 atm)|Pt If E = +0.66 V and E^$\omicron$10 = +0.76 V at 25^$\omicron$C, Calculate the concentration of H⁺ in the cathode cell compartment.

What is the molarity of OH^- in a 0.0018 M calcium hydroxide solution?

Which species will reduce Ag⁺ but not Fe²⁺?

Which of the following water-insoluble salts is more soluble in 1.0 M HClO₄(aq)?

Which pair of metals will dissolve in nitric acid?

The titration curve for the titration of 0.100 M Na₂CO₃(aq) with 0.100 M HClO₄(aq) Is: Estimate pK_b1.

Which of the following occurs when HNO₃(aq), Cu(s), And Pt(s)Are mixed under standard conditions?

If the pK_a of acetic acid is 4.75, the pK_a of CH₃CH₂OH is

How many moles of KOH(s)must be added to 1.00 L of 0.782 M HF(aq)to produce a buffer with a pH = 4.00?

The amino acid methionine, HOOC-CH(CH₂CH₂SCH₃)NH₃⁺,Has pK_a1 = 2.2 and pK_a2 = 9.1.If this amino acid is represented by H₂L⁺,The major species at pH 6 is

What is the conjugate base of H₂PO₄^- ?

If E^$\omicron$for the following cell is 0.36 V at 25^$\omicron$C Pb(s)|PbSO₄(s)|SO₄²^-(aq,0.60 M)M H⁺(aq,0.70 M)|H₂(g,192.5 kPa)|Pt How is the Nernst equation for the cell properly expressed at this temperature?

Calculate the ratio of the molarities of CO₃²^- and HCO₃^-ions required to achieve buffering at pH = 9.0 .For H₂CO₃,PK_a1 = 6.37,And pK_a2 = 10.00.

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Exam 6: Reactions

The pH of 0.10 M solution and 0.35 M solution of NaHCO3(aq)must differ for each solution.

The amino acid alanine, HOOC-CH(CH3)NH3+,Has Ka1 = 4.5 *10-3 and Ka2 = 1.4 * 10-10.Calculate α\alphaα (HOOC-CH(CH3)NH3+)At pH 3.

The following 0.1 M aqueous solutions are arranged in order of increasing pH, with the highest pH on the far right. Which one of the following 0.10 M aqueous solutions should be placed in the empty box?

For a solution labeled "0.10 M H2SO4(aq),"

The pH of 0.10 M pyridine(aq) is 9.13.What is the value of Kb for pyridine?

Which of the following occurs when HCl(aq), Cu(s),And Fe(s)Are mixed under standard conditions?

For a solution labeled "0.10 M H2SO3(aq)," pKa1 = 1.81 and pKa2 = 6.91, which of the following is true?

Consider the following cell: Zn(s)|Zn2+(aq,0.200 M)M H+(aq,?)|H2(g,1.00 atm)|Pt If E = +0.66 V and E ο\omicronο 10 = +0.76 V at 25 ο\omicronο C, Calculate the concentration of H+ in the cathode cell compartment.

What is the molarity of OH- in a 0.0018 M calcium hydroxide solution?

Which species will reduce Ag+ but not Fe2+?

Which of the following water-insoluble salts is more soluble in 1.0 M HClO4(aq)?

Which pair of metals will dissolve in nitric acid?

The titration curve for the titration of 0.100 M Na2CO3(aq) with 0.100 M HClO4(aq) Is: Estimate pKb1.

Which of the following occurs when HNO3(aq), Cu(s), And Pt(s)Are mixed under standard conditions?

If the pKa of acetic acid is 4.75, the pKa of CH3CH2OH is

How many moles of KOH(s)must be added to 1.00 L of 0.782 M HF(aq)to produce a buffer with a pH = 4.00?

The amino acid methionine, HOOC-CH(CH2CH2SCH3)NH3+,Has pKa1 = 2.2 and pKa2 = 9.1.If this amino acid is represented by H2L+,The major species at pH 6 is

What is the conjugate base of H2PO4- ?

If E ο\omicronο for the following cell is 0.36 V at 25 ο\omicronο C Pb(s)|PbSO4(s)|SO42-(aq,0.60 M)M H+(aq,0.70 M)|H2(g,192.5 kPa)|Pt How is the Nernst equation for the cell properly expressed at this temperature?

Calculate the ratio of the molarities of CO32- and HCO3-ions required to achieve buffering at pH = 9.0 .For H2CO3,PKa1 = 6.37,And pKa2 = 10.00.

Atoms

Molecules

States of Matter

Thermodynamics

Equilibrium

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

The pH of 0.10 M solution and 0.35 M solution of NaHCO₃(aq)must differ for each solution.

The amino acid alanine, HOOC-CH(CH₃)NH₃⁺,Has K_a1 = 4.5 10^-³ and K_a2 = 1.4 10^-¹⁰.Calculate $\alpha$ (HOOC-CH(CH₃)NH₃⁺)At pH 3.

For a solution labeled "0.10 M H₂SO₄(aq),"

The pH of 0.10 M pyridine(aq) is 9.13.What is the value of K_bfor pyridine?

For a solution labeled "0.10 M H₂SO₃(aq)," pK_a1 = 1.81 and pK_a2 = 6.91, which of the following is true?

Consider the following cell: Zn(s)|Zn²⁺(aq,0.200 M)M H⁺(aq,?)|H₂(g,1.00 atm)|Pt If E = +0.66 V and E^$\omicron$10 = +0.76 V at 25^$\omicron$C, Calculate the concentration of H⁺ in the cathode cell compartment.

What is the molarity of OH^- in a 0.0018 M calcium hydroxide solution?

Which species will reduce Ag⁺ but not Fe²⁺?

Which of the following water-insoluble salts is more soluble in 1.0 M HClO₄(aq)?

The titration curve for the titration of 0.100 M Na₂CO₃(aq) with 0.100 M HClO₄(aq) Is: Estimate pK_b1.

Which of the following occurs when HNO₃(aq), Cu(s), And Pt(s)Are mixed under standard conditions?

If the pK_a of acetic acid is 4.75, the pK_a of CH₃CH₂OH is

The amino acid methionine, HOOC-CH(CH₂CH₂SCH₃)NH₃⁺,Has pK_a1 = 2.2 and pK_a2 = 9.1.If this amino acid is represented by H₂L⁺,The major species at pH 6 is

What is the conjugate base of H₂PO₄^- ?

If E^$\omicron$for the following cell is 0.36 V at 25^$\omicron$C Pb(s)|PbSO₄(s)|SO₄²^-(aq,0.60 M)M H⁺(aq,0.70 M)|H₂(g,192.5 kPa)|Pt How is the Nernst equation for the cell properly expressed at this temperature?

Calculate the ratio of the molarities of CO₃²^- and HCO₃^-ions required to achieve buffering at pH = 9.0 .For H₂CO₃,PK_a1 = 6.37,And pK_a2 = 10.00.