Question 1

Which of the following solutions can function as a buffer?

Accepted Answer

A) a solution containing HC2H3O2 and NaC2H3O2 
B) a solution containing H2CO3 and NaHCO3 
C) a solution containing NH3 and NH4Cl 
D) all of the above 
A) a solution containing HC2H3O2 and NaC2H3O2 
B) a solution containing H2CO3 and NaHCO3 
C) a solution containing NH3 and NH4Cl 
D) all of the above

Question 2

Which of the following is characteristic of a buffer?

Accepted Answer

A) The pH will go down significantly when H3O+ is added to the buffer. 
B) The pH will go down very slightly when H3O+ is added to a buffer. 
C) The pH will go up significantly when H3O+ is added to the buffer. 
D) The pH will go up very slightly when H3O+ is added to the buffer. 
A) The pH will go down significantly when H3O+ is added to the buffer. 
B) The pH will go down very slightly when H3O+ is added to a buffer. 
C) The pH will go up significantly when H3O+ is added to the buffer. 
D) The pH will go up very slightly when H3O+ is added to the buffer.

Question 3

NaOH and H2SO4 are mixed and allowed to react. How many grams of NaOH are required to neutralize 17.25 g of H2SO4?

Accepted Answer

Question 4

In converting from the pH of a solution to the corresponding H3O+ concentration, the following equation should be used.
[H3O+] = 10-pH

Accepted Answer

A) True 
 B)False

Question 5

The buffer solution in the flask was prepared using one of the substances shown below.
citric acid (pKS1U1B1aS1U1B0 3.08)
NaHS1U1B12S1U1B0POS1U1B14S1U1B0 (pKS1U1B1aS1U1B0 7.21)
NHS1U1B14S1U1B0Cl (pKS1U1B1aS1U1B0 9.25)
Using the pH meter and solution shown in the image below,   complete the following statements using one of the terms below.
increase
decrease
remain constant
citric acid
NaHS1U1B12S1U1B0POS1U1B14S1U1B0
NHS1U1B14S1U1B0Cl
-The buffer solution in the beaker could be prepared using__________.

Accepted Answer

The answer of The buffer solution in the flask was...

Question 6

Using the above table,fill in the blank with the appropriate integer (1 ,2,3,...)indicating the buffer and/or the letter indicating the formula below.
-Buffer ______________________ would be the most effective buffer in basic solutions.
A)H3C2O4+
B)HC2O4-
C)C3H4O32-
D)HC3H5O3
E)C2H3O2-
F)H2C2H3O2
G)C3H5O3-

Accepted Answer

Question 7

Which of the following substances can react with both HCl and NaOH?.

Accepted Answer

A) Ca(HCO3)2 
B) KCl 
C) CH3CH2NH2 
D) H2C2O4 
A) Ca(HCO3)2 
B) KCl 
C) CH3CH2NH2 
D) H2C2O4

Question 8

Consider the following three buffer reactions.
Buffer 1: protein-HS1U1P1+S1S1P0 and protein
Buffer 2: HS1U1B12S1U1B0COS1U1B13S1U1B0 and HCOS1U1B13S1U1B0S1U1P1-S1S1P0
Buffer 3: HS1U1B12S1U1B0POS1U1B14S1U1B0S1U1P1-S1S1P0 and HPOS1U1B14S1U1B0S1U1P12-S1S1P0
Fill in the blank with the appropriate integer (1,2,or 3)to indicate the buffer system described.
-Buffer__________________is found in both plasma and red blood cells.

Accepted Answer

The answer of Consider the following three buffer reactions.
Buffer 1:...

Question 9

Which of the following will determine the pH of a buffer made using acetic acid (HC2H3O2) and sodium acetate (NaC2H3O2)?

Accepted Answer

A) the amount of water present 
B) the concentration of C2H3O2- 
C) the concentration of HC2H3O2 
D) the ratio of the concentrations of C2H3O2- and HC2H3O2 
A) the amount of water present 
B) the concentration of C2H3O2- 
C) the concentration of HC2H3O2 
D) the ratio of the concentrations of C2H3O2- and HC2H3O2

Question 10

In an aqueous solution. the [OH-] is 2.0 × 10-3 M. What is the [H3O+] of this solution?

Accepted Answer

A) 5.0 × 10-12 M 
B) 2.0 × 1011 M 
C) 2.0 × 10-3 M 
D) 5.0 × 1012 M 
A) 5.0 × 10-12 M 
B) 2.0 × 1011 M 
C) 2.0 × 10-3 M 
D) 5.0 × 1012 M

Question 11

Consider the following reaction.
CH3OH(l) + CH3OH(l)   CH3O-(l) + CH3OH2+(l)
This reaction could be classified as both an autoionization reaction and a proton transfer reaction.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is most likely to be a salt?

Accepted Answer

A) Ca(NO3)2 
B) CH3Cl 
C) CH3CH2NH2 
D) H2C2O4 
A) Ca(NO3)2 
B) CH3Cl 
C) CH3CH2NH2 
D) H2C2O4

Question 13

When a solution of HF (a weak acid) is added to a solution containing HPO42- (here, a base), the equation for reaction that occurs is:

Accepted Answer

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

Question 14

Which of the following is excreted by the kidneys to regulate the effect of excess protein in the diet?

Accepted Answer

A) NH4+ 
B) H3O+ 
C) HCO3- 
D) H2PO4- 
A) NH4+ 
B) H3O+ 
C) HCO3- 
D) H2PO4-

Question 15

The chemical equation for the reaction of the base, ethoxide, CH3CH2O-, with water would show the products:

Accepted Answer

A) CH3CH2OH and OH- 
B) CH3CH3 and H3O+ 
C) CH3CH2OH and H3O+ 
D) CH3CH3 and OH- 
A) CH3CH2OH and OH- 
B) CH3CH3 and H3O+ 
C) CH3CH2OH and H3O+ 
D) CH3CH3 and OH-

Question 16

Consider the following reaction. 
  + H2O   HN3 + OH− 
This reaction indicates that:

Accepted Answer

A)    is a weak base. 
B)    is a strong base. 
C)    is a weak acid. 
D)    is a strong acid. 
A)    is a weak base. 
B)    is a strong base. 
C)    is a weak acid. 
D)    is a strong acid.

Question 17

A solution composed of HCl and NaCl would produce an effective buffer.

Accepted Answer

A) True 
 B)False

Question 18

Adipic acid has the formula given below.   Thus substance would be classified as amphiprotic.

Accepted Answer

A) True 
 B)False

Question 19

The buffer solution in the flask was prepared using one of the substances shown below.
citric acid (pKS1U1B1aS1U1B0 3.08)
NaHS1U1B12S1U1B0POS1U1B14S1U1B0 (pKS1U1B1aS1U1B0 7.21)
NHS1U1B14S1U1B0Cl (pKS1U1B1aS1U1B0 9.25)
Using the pH meter and solution shown in the image below,   complete the following statements using one of the terms below.
increase
decrease
remain constant
citric acid
NaHS1U1B12S1U1B0POS1U1B14S1U1B0
NHS1U1B14S1U1B0Cl
-If KOH were added to the buffer solution the pH of the solution would __________.

Accepted Answer

The answer of The buffer solution in the flask was...

Question 20

Which of the following is true of a buffer prepared with equal concentrations of an acid and its conjugate base?

Accepted Answer

A) pH = 7 
B) pH = pKa 
C) The pH depends on the concentration of the buffer. 
D) none of the above 
A) pH = 7 
B) pH = pKa 
C) The pH depends on the concentration of the buffer. 
D) none of the above

Which of the following solutions can function as a buffer?

Which of the following is characteristic of a buffer?

NaOH and H₂SO₄ are mixed and allowed to react. How many grams of NaOH are required to neutralize 17.25 g of H₂SO₄?

In converting from the pH of a solution to the corresponding H₃O⁺ concentration, the following equation should be used. [H₃O⁺] = 10^-pH

Which of the following substances can react with both HCl and NaOH?.

Which of the following will determine the pH of a buffer made using acetic acid (HC₂H₃O₂) and sodium acetate (NaC₂H₃O₂)?

In an aqueous solution. the [OH^-] is 2.0 × 10^-3 M. What is the [H₃O⁺] of this solution?

Consider the following reaction. CH₃OH(l) + CH₃OH(l) CH₃O^-(l) + CH₃OH₂⁺(l) This reaction could be classified as both an autoionization reaction and a proton transfer reaction.

Which of the following is most likely to be a salt?

When a solution of HF (a weak acid) is added to a solution containing HPO₄^2- (here, a base), the equation for reaction that occurs is:

Which of the following is excreted by the kidneys to regulate the effect of excess protein in the diet?

The chemical equation for the reaction of the base, ethoxide, CH₃CH₂O^-, with water would show the products:

Consider the following reaction. + H₂O HN₃ + OH− This reaction indicates that:

A solution composed of HCl and NaCl would produce an effective buffer.

Adipic acid has the formula given below. Thus substance would be classified as amphiprotic.

Which of the following is true of a buffer prepared with equal concentrations of an acid and its conjugate base?

Measurements in Science and Medicine

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Hydrocarbons: An Introduction to Organic Molecules

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Exam 7: Acids and Bases

Which of the following solutions can function as a buffer?

Which of the following is characteristic of a buffer?

NaOH and H2SO4 are mixed and allowed to react. How many grams of NaOH are required to neutralize 17.25 g of H2SO4?

In converting from the pH of a solution to the corresponding H3O+ concentration, the following equation should be used. [H3O+] = 10-pH

Which of the following substances can react with both HCl and NaOH?.

Which of the following will determine the pH of a buffer made using acetic acid (HC2H3O2) and sodium acetate (NaC2H3O2)?

In an aqueous solution. the [OH-] is 2.0 × 10-3 M. What is the [H3O+] of this solution?

Consider the following reaction. CH3OH(l) + CH3OH(l) CH3O-(l) + CH3OH2+(l) This reaction could be classified as both an autoionization reaction and a proton transfer reaction.

Which of the following is most likely to be a salt?

When a solution of HF (a weak acid) is added to a solution containing HPO42- (here, a base), the equation for reaction that occurs is:

Which of the following is excreted by the kidneys to regulate the effect of excess protein in the diet?

The chemical equation for the reaction of the base, ethoxide, CH3CH2O-, with water would show the products:

Consider the following reaction. + H2O HN3 + OH− This reaction indicates that:

A solution composed of HCl and NaCl would produce an effective buffer.

Adipic acid has the formula given below. Thus substance would be classified as amphiprotic.

Which of the following is true of a buffer prepared with equal concentrations of an acid and its conjugate base?

Measurements in Science and Medicine

Atoms, Elements, and Compounds

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Chemical Reactions

Nuclear Chemistry

Hydrocarbons: An Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Proteins

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

Filters

NaOH and H₂SO₄ are mixed and allowed to react. How many grams of NaOH are required to neutralize 17.25 g of H₂SO₄?

In converting from the pH of a solution to the corresponding H₃O⁺ concentration, the following equation should be used. [H₃O⁺] = 10^-pH

Which of the following will determine the pH of a buffer made using acetic acid (HC₂H₃O₂) and sodium acetate (NaC₂H₃O₂)?

In an aqueous solution. the [OH^-] is 2.0 × 10^-3 M. What is the [H₃O⁺] of this solution?

Consider the following reaction. CH₃OH(l) + CH₃OH(l) CH₃O^-(l) + CH₃OH₂⁺(l) This reaction could be classified as both an autoionization reaction and a proton transfer reaction.

When a solution of HF (a weak acid) is added to a solution containing HPO₄^2- (here, a base), the equation for reaction that occurs is:

The chemical equation for the reaction of the base, ethoxide, CH₃CH₂O^-, with water would show the products:

Consider the following reaction. + H₂O HN₃ + OH− This reaction indicates that: