Ch.14 - Chemical EquilibriumWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: The reaction A2 + B2 ⇌ 2 AB has an equilibrium constant Kc =1.5. The following diagrams represent reaction mixtures containing A2 molecules (red), B2 molecules (blue), and AB molecules.For mixture (ii

Solution: The reaction A2 + B2 ⇌ 2 AB has an equilibrium constant Kc =1.5. The following diagrams represent reaction mixtures containing A2 molecules (red), B2 molecules (blue), and AB molecules.For mixture (ii

Problem

The reaction A2 + B2 ⇌ 2 AB has an equilibrium constant Kc =1.5. The following diagrams represent reaction mixtures containing A2 molecules (red), B2 molecules (blue), and AB molecules.

For mixture (iii), how will the reaction proceed to reach equilibrium?

A figure showing three diagrams of molecular mixtures. In diagram (i) there is 1 A2 molecule, 1 B2 molecule, and 6 AB molecules. In diagram (ii) there are 3 A2 molecules, 2 B2 molecules, and 3 AB molecules. In diagram (iii) there are 3 A2 molecules, 3 B2 molecules, and 2 AB molecules.

Solution

We are being asked to determine the condition for mixture (iii) to reach equilibrium.

We will use the reaction quotient, Q, to determine if the chemical reaction would be at equilibrium or not. 

The formula for Q is:

Q = productsreactants


Depending on if Q is greater than or less than K, our reaction will shift to attain equilibrium by reaching the equilibrium constant K:

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