The Keq for the equilibrium below is 5.4 × 1013 at 480.0°C. 2NO (g)+ O2 (g) 2NO2 (g) What is the value of Keq at this temperature for the following reaction? NO2 (g) NO (g)+ 1/2 O2 (g)

A) 5.4 × 10-13 B) 5.4 × 1013 C) 1.4 × 10-7 D) 5.66 × 10-3 E) none of the above A) 5.4 × 10-13 B) 5.4 × 1013 C) 1.4 × 10-7 D) 5.66 × 10-3 E) none of the above

Kp = 0.0198 at 721 K for the reaction 2HI (g) H2 (g)+ I2 (g) In a particular experiment, the partial pressures of H2 and I2 at equilibrium are 0.836 and 0.701 atm, respectively. The partial pressure of HI is __________ atm.

A) 7.87 B) 29.6 C) 5.44 D) 0.108 E) 0.0116 A) 7.87 B) 29.6 C) 5.44 D) 0.108 E) 0.0116

Consider the following chemical reaction: CO (g)+ 2H2 (g) CH3OH(g) At equilibrium in a particular experiment, the concentrations of CO and H2 were 0.15 M and0.36 M,respectively. What is the equilibrium concentration of CH3OH? The value of Keq for this reaction is 14.5 at the temperature of the experiment.

A) 14.5 B) 7.61 × 10-3 C) 2.82 × 10-1 D) 3.72 × 10-3 E) 1.34 × 10-3 A) 14.5 B) 7.61 × 10-3 C) 2.82 × 10-1 D) 3.72 × 10-3 E) 1.34 × 10-3

Phosphorous trichloride and phosphorous pentachloride equilibrate in the presence of molecular chlorine according to the reaction: PCl3 (g)+ Cl2 (g) PCl5 (g) An equilibrium mixture at 450 K contains PPCl3 = 0.124 atm, PCl2 = 0.157 atm, and PPCl5 = 1.30 atm. What is the value of Kp at this temperature?

A) 66.7 B) 1.50 × 10-2 C) 2.53 × 10-2 D) 1.02 E) 4.63 A) 66.7 B) 1.50 × 10-2 C) 2.53 × 10-2 D) 1.02 E) 4.63

Exam 15: Chemical Equilibrium

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Acetic acid is a weak acid that dissociates into the acetate ion and a proton in aqueous solution: HC₂H₃O₂ (aq) C₂H₃O₂^- (aq)+ H⁺ (aq) At equilibrium at 25 °C a 0.100 M solution of acetic acid has the following concentrations: [HC₂H₃O₂] = 0.0990 M, [C₂H₃O₂^-] = 1.33 × 10^-3 M, and [H⁺] = 1.33 × 10^-3 M. The equilibrium constant, K_eq, for the ionization of acetic acid at 25°C is __________.

(Multiple Choice)

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Question 81

Which of the following expressions is the correct equilibrium-constant expression for the reaction below? CO₂ (s)+ H₂O (l) H⁺ (aq)+ HCO₃^- (aq)

(Multiple Choice)

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Question 82

The K_eq for the equilibrium below is 5.4 × 10¹³ at 480.0°C. 2NO (g)+ O₂ (g) 2NO₂ (g) What is the value of K_eq at this temperature for the following reaction? NO₂ (g) NO (g)+ 1/2 O₂ (g)

(Multiple Choice)

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Question 83

The effect of a catalyst on a chemical reaction is to react with product, effectively removing it and shifting the equilibrium to the right.

(True/False)

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Question 84

K_p = 0.0198 at 721 K for the reaction 2HI (g) H₂ (g)+ I₂ (g) In a particular experiment, the partial pressures of H₂ and I₂ at equilibrium are 0.836 and 0.701 atm, respectively. The partial pressure of HI is __________ atm.

(Multiple Choice)

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Question 85

Of the following equilibria, only __________ will shift to the left in response to a decrease in volume.

(Multiple Choice)

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Question 86

In which of the following reactions would increasing pressure at constant temperature change the concentrations of reactants and products, based on Le Châteliers principle?

(Multiple Choice)

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Question 87

Consider the following chemical reaction: CO (g)+ 2H₂ (g) CH₃OH(g) At equilibrium in a particular experiment, the concentrations of CO and H₂ were 0.15 M and0.36 M,respectively. What is the equilibrium concentration of CH₃OH? The value of K_eq for this reaction is 14.5 at the temperature of the experiment.

(Multiple Choice)

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Question 88

The number obtained by substituting starting reactant and product concentrations into an equilibrium-constant expression is known as the __________.

(Short Answer)

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Question 89

The relationship between the concentrations of reactants and products of a system at equilibrium is given by the law of mass action.

(True/False)

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Question 90

Phosphorous trichloride and phosphorous pentachloride equilibrate in the presence of molecular chlorine according to the reaction: PCl₃ (g)+ Cl₂ (g) PCl₅ (g) An equilibrium mixture at 450 K contains PPCl₃ = 0.124 atm, PCl₂ = 0.157 atm, and PPCl₅ = 1.30 atm. What is the value of K_p at this temperature?

(Multiple Choice)

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Question 91

The equilibrium-constant expression for a reaction written in one direction is the __________ of the one for the reaction written for the reverse direction.

(Short Answer)

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Question 92

Showing 81 - 92 of 92

Which of the following expressions is the correct equilibrium-constant expression for the reaction below? CO₂ (s)+ H₂O (l) H⁺ (aq)+ HCO₃^- (aq)

The K_eq for the equilibrium below is 5.4 × 10¹³ at 480.0°C. 2NO (g)+ O₂ (g) 2NO₂ (g) What is the value of K_eq at this temperature for the following reaction? NO₂ (g) NO (g)+ 1/2 O₂ (g)

The effect of a catalyst on a chemical reaction is to react with product, effectively removing it and shifting the equilibrium to the right.

K_p = 0.0198 at 721 K for the reaction 2HI (g) H₂ (g)+ I₂ (g) In a particular experiment, the partial pressures of H₂ and I₂ at equilibrium are 0.836 and 0.701 atm, respectively. The partial pressure of HI is __________ atm.

Of the following equilibria, only __________ will shift to the left in response to a decrease in volume.

In which of the following reactions would increasing pressure at constant temperature change the concentrations of reactants and products, based on Le Châteliers principle?

The number obtained by substituting starting reactant and product concentrations into an equilibrium-constant expression is known as the __________.

The relationship between the concentrations of reactants and products of a system at equilibrium is given by the law of mass action.

The equilibrium-constant expression for a reaction written in one direction is the __________ of the one for the reaction written for the reverse direction.

Introduction: Matter and Measurement

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Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

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Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

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Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

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Additional Aspects of Aqueous Equilibria

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Exam 15: Chemical Equilibrium

Which of the following expressions is the correct equilibrium-constant expression for the reaction below? CO2 (s)+ H2O (l) H+ (aq)+ HCO3- (aq)

The Keq for the equilibrium below is 5.4 × 1013 at 480.0°C. 2NO (g)+ O2 (g) 2NO2 (g) What is the value of Keq at this temperature for the following reaction? NO2 (g) NO (g)+ 1/2 O2 (g)

The effect of a catalyst on a chemical reaction is to react with product, effectively removing it and shifting the equilibrium to the right.

Kp = 0.0198 at 721 K for the reaction 2HI (g) H2 (g)+ I2 (g) In a particular experiment, the partial pressures of H2 and I2 at equilibrium are 0.836 and 0.701 atm, respectively. The partial pressure of HI is __________ atm.

Of the following equilibria, only __________ will shift to the left in response to a decrease in volume.

In which of the following reactions would increasing pressure at constant temperature change the concentrations of reactants and products, based on Le Châteliers principle?

The number obtained by substituting starting reactant and product concentrations into an equilibrium-constant expression is known as the __________.

The relationship between the concentrations of reactants and products of a system at equilibrium is given by the law of mass action.

The equilibrium-constant expression for a reaction written in one direction is the __________ of the one for the reaction written for the reverse direction.

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

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Which of the following expressions is the correct equilibrium-constant expression for the reaction below? CO₂ (s)+ H₂O (l) H⁺ (aq)+ HCO₃^- (aq)

The K_eq for the equilibrium below is 5.4 × 10¹³ at 480.0°C. 2NO (g)+ O₂ (g) 2NO₂ (g) What is the value of K_eq at this temperature for the following reaction? NO₂ (g) NO (g)+ 1/2 O₂ (g)

K_p = 0.0198 at 721 K for the reaction 2HI (g) H₂ (g)+ I₂ (g) In a particular experiment, the partial pressures of H₂ and I₂ at equilibrium are 0.836 and 0.701 atm, respectively. The partial pressure of HI is __________ atm.