Question 1

What kind of molecular collisions will not lead to the formation of product in a reaction?

Accepted Answer

A) Only those without sufficient kinetic energy 
B) Only those with the wrong orientation, regardless of the kinetic energy 
C) Collisions between molecules that have more energy than the minimum required 
D) Those without sufficient kinetic energy and with the wrong orientation 
E) Those with effective collisions 
A) Only those without sufficient kinetic energy 
B) Only those with the wrong orientation, regardless of the kinetic energy 
C) Collisions between molecules that have more energy than the minimum required 
D) Those without sufficient kinetic energy and with the wrong orientation 
E) Those with effective collisions

Question 2

Which of the following statements does not correctly describe the character of a chemical equilibrium?

Accepted Answer

A) As a system comes to equilibrium, the chemical reactions come to a stop 
B) In a liquid-gas equilibrium, the number of moles of the gas does not necessarily equal the number of moles of the liquid 
C) In a solution equilibrium, the number of moles of the solvent does not necessarily equal the number of moles of the liquid 
D) All of the statements above correctly describe a chemical equilibrium 
E) None of the statements above correctly describes a chemical equilibrium 
A) As a system comes to equilibrium, the chemical reactions come to a stop 
B) In a liquid-gas equilibrium, the number of moles of the gas does not necessarily equal the number of moles of the liquid 
C) In a solution equilibrium, the number of moles of the solvent does not necessarily equal the number of moles of the liquid 
D) All of the statements above correctly describe a chemical equilibrium 
E) None of the statements above correctly describes a chemical equilibrium

Question 3

How will the rate of reaction change if the concentration of reactants is decreased?

Accepted Answer

A) The rate will increase 
B) The rate will decrease 
C) Products will form more rapidly, so there will be no change in the rate 
D) The rate of product formation will increase 
E) A change in concentration leads to an unpredictable effect on the rate of reaction 
A) The rate will increase 
B) The rate will decrease 
C) Products will form more rapidly, so there will be no change in the rate 
D) The rate of product formation will increase 
E) A change in concentration leads to an unpredictable effect on the rate of reaction

Question 4

Which of the following statements is/are incorrect?
i.Undissolved sugar in contact with a saturated sugar solution in an open beaker cannot reach equilibrium
ii.A liquid and its vapor enclosed in two one-liter containers connected by an open glass tube cannot reach equilibrium
iii.A solution of a weak acid,hydronium ion,and the conjugate base of the weak acid cannot reach equilibrium

Accepted Answer

A) i only 
B) ii only 
C) i and ii 
D) ii and iii 
E) i, ii, and iii 
A) i only 
B) ii only 
C) i and ii 
D) ii and iii 
E) i, ii, and iii

Question 5

Find the pH of a 0.10 M solution of benzoic acid,C6H5COOH,if the solution is also 0.15 M in C6H5COO-.Ka = 6.3 × 10-5.

Accepted Answer

A) 9.62 
B) 5.20 
C) 4.02 
D) 4.20 
E) 4.38 
A) 9.62 
B) 5.20 
C) 4.02 
D) 4.20 
E) 4.38

What kind of molecular collisions will not lead to the formation of product in a reaction?

Which of the following statements does not correctly describe the character of a chemical equilibrium?

How will the rate of reaction change if the concentration of reactants is decreased?

Find the pH of a 0.10 M solution of benzoic acid,C₆H₅COOH,if the solution is also 0.15 M in C₆H₅COO^-.K_a = 6.3 × 10^-5.

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Exam 18: Chemical Equilibrium

What kind of molecular collisions will not lead to the formation of product in a reaction?

Which of the following statements does not correctly describe the character of a chemical equilibrium?

How will the rate of reaction change if the concentration of reactants is decreased?

Find the pH of a 0.10 M solution of benzoic acid,C6H5COOH,if the solution is also 0.15 M in C6H5COO-.Ka = 6.3 × 10-5.

Matter and Energy

Measurement and Chemical Calculations

Introduction to Gases

Atomic Theory: The Nuclear Model of the Atom

Chemical Nomenclature

Chemical Formula Relationships

Chemical Reactions

Chemical Change

Quantity Relationships in Chemical Reactions

Atomic Theory: The Quantum Model of the Atom

Chemical Bonding

Structure and Shape

The Ideal Gas Law and Its Applications

Gases, Liquids, and Solids

Solutions

Acidbase Proton Transferreactions

Oxidationreduction Electron Transferreactions

Nuclear Chemistry

Organic Chemistry

Biochemistry

Filters

Find the pH of a 0.10 M solution of benzoic acid,C₆H₅COOH,if the solution is also 0.15 M in C₆H₅COO^-.K_a = 6.3 × 10^-5.