In Figure P 14.2, the red spheres represent reactant A and...

In Figure $\mathrm{P} 14.2,$ the red spheres represent reactant A and the blue spheres represent product B in equilibrium with A.
a. Write a chemical equation that describes the equilibrium.
b. What is the value of the equilibrium constant $K_{\mathrm{c}} ?$
(FIGURE CANNOT COPY)

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Key Concepts

Chemical Equilibrium

Chemical equilibrium refers to a state in a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction. In this state, the concentrations of reactants and products remain constant over time, although both reactions continue to occur. This concept is crucial in understanding how reactions can be represented with a reversible arrow, indicating that the system maintains a dynamic balance.

Equilibrium Constant

The equilibrium constant, denoted as Kc when using concentrations, is a numerical value that expresses the ratio of the concentrations of products to reactants at equilibrium, with each concentration raised to the power of its stoichiometric coefficient. It provides insight into the position of equilibrium, indicating whether the system favors the formation of products or reactants.

Chemical Equation Representation

Writing a chemical equation that represents a reversible reaction at equilibrium involves showing the transformation of reactants into products with a double arrow. This notation highlights that the reaction can proceed in both the forward and reverse directions, reflecting the dynamic balance between the two.

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