Question 1

Use the following information to answer 
HS1U1B12S1U1B0Se: KS1U1B1a1S1U1B0 = 1.0 x 10S1U1P1-4S1S1P0, KS1U1B1a2S1U1B0 = 1.0 x 10S1U1P1-10S1S1P0
-If sodium selenide is added to pure water, we would expect the pH to:

Accepted Answer

A)  increase. 
B)  decrease. 
C)  remain the same. 
D)  change in a direction that can't be predicted from this information. 
A)  increase. 
B)  decrease. 
C)  remain the same. 
D)  change in a direction that can't be predicted from this information.

Question 2

What is the pH of a solution that is 1.7 x 10-4 M in H3O+?

Accepted Answer

A)  3.77 
B)  4.77 
C)  4.23 
D)  10.23 
E)  none of these 
A)  3.77 
B)  4.77 
C)  4.23 
D)  10.23 
E)  none of these

Question 3

Methanol is described by the following skeleton structure.
  
Which substance is formed when CH3OH acts as a Brønsted base?

Accepted Answer

A)  CH3O- 
B)  CH3OH 
C)  CH3OH2+ 
D)  CH3OH. 
E)  H3O+ 
A)  CH3O- 
B)  CH3OH 
C)  CH3OH2+ 
D)  CH3OH. 
E)  H3O+

Question 4

What is the conjugate base of thiocyanic acid, HSCN?

Accepted Answer

A)  H3O+ 
B)  OH - 
C)  SCN - 
D)  CN - 
E)  H2SCN+ 
A)  H3O+ 
B)  OH - 
C)  SCN - 
D)  CN - 
E)  H2SCN+

Question 5

Hydrogen peroxide has been used as a bleach to change hair color, as a disinfectant to treat wounds and as a rocket fuel. It is also a weak acid. Calculate the pH of a 0.018 M H2O2 solution. (H2O2: Ka = 2.2 x 10-12)

Accepted Answer

A)  0.6 
B)  6.7 
C)  7.3 
D)  11.7 
E)  13.4 
A)  0.6 
B)  6.7 
C)  7.3 
D)  11.7 
E)  13.4

Use the following information to answer H₂Se: K_a1 = 1.0 x 10^-4, K_a2 = 1.0 x 10^-10 -If sodium selenide is added to pure water, we would expect the pH to:

What is the pH of a solution that is 1.7 x 10^-4 M in H₃O⁺?

Methanol is described by the following skeleton structure. Which substance is formed when CH₃OH acts as a Brønsted base?

What is the conjugate base of thiocyanic acid, HSCN?

Hydrogen peroxide has been used as a bleach to change hair color, as a disinfectant to treat wounds and as a rocket fuel. It is also a weak acid. Calculate the pH of a 0.018 M H₂O₂ solution. (H₂O₂: K_a = 2.2 x 10^-12)

Elements Compounds

The Mole

Structure of the Atom

The Covalent Bond

Ionic and Metallic Bonds

Gases

Making and Breaking of Bonds

Liquids and Solutions

Solids

An Introduction to Kinetics and Equilibrium

Oxidation-Reduction Reactions

Chemical Thermodynamics

Kinetics

Nuclear Chemistry

Organic Chemistry

Filters

Exam 11: Acids and Bases

Use the following information to answer H2Se: Ka1 = 1.0 x 10-4, Ka2 = 1.0 x 10-10 -If sodium selenide is added to pure water, we would expect the pH to:

What is the pH of a solution that is 1.7 x 10-4 M in H3O+?

Methanol is described by the following skeleton structure. Which substance is formed when CH3OH acts as a Brønsted base?

What is the conjugate base of thiocyanic acid, HSCN?

Hydrogen peroxide has been used as a bleach to change hair color, as a disinfectant to treat wounds and as a rocket fuel. It is also a weak acid. Calculate the pH of a 0.018 M H2O2 solution. (H2O2: Ka = 2.2 x 10-12)

Elements Compounds

The Mole

Structure of the Atom

The Covalent Bond

Ionic and Metallic Bonds

Gases

Making and Breaking of Bonds

Liquids and Solutions

Solids

An Introduction to Kinetics and Equilibrium

Oxidation-Reduction Reactions

Chemical Thermodynamics

Kinetics

Nuclear Chemistry

Organic Chemistry

Filters

Use the following information to answer H₂Se: K_a1 = 1.0 x 10^-4, K_a2 = 1.0 x 10^-10 -If sodium selenide is added to pure water, we would expect the pH to:

What is the pH of a solution that is 1.7 x 10^-4 M in H₃O⁺?

Methanol is described by the following skeleton structure. Which substance is formed when CH₃OH acts as a Brønsted base?

Hydrogen peroxide has been used as a bleach to change hair color, as a disinfectant to treat wounds and as a rocket fuel. It is also a weak acid. Calculate the pH of a 0.018 M H₂O₂ solution. (H₂O₂: K_a = 2.2 x 10^-12)