Question

For the following chemical equation which answer best represents the equilibrium constant K.

A + B -----> X + Y

Question 7 options:

A. ( [x] / [y] ) * ( [a] / [b] )

B. ( [a] * [b] ) / ( [x] * [y] )

C. ( [a] * [b] ) / ( [x]² * [y]² )

D. ( [a] * [b]) / ( [x] * [y] )²

E. ( [x] * [y] ) / ( [a] * [b] )

Answer 1

E. ( [x] * [y] ) / ( [a] * [b] ) The equilibrium constant (K) for a reaction A + B → X + Y is represented by ( [X] * [Y] ) / ( [A] * [B] ), which follows the general rule of products over reactants.

Step-by-step explanation:

The student is asking about the expression for the equilibrium constant (K) for the chemical reaction A + B → X + Y. The correct answer is ( [X] * [Y] ) / ( [A] * [B] ), which means that the equilibrium constant K is determined by the ratio of the product concentrations to the reactant concentrations,

each raised to the power of their respective coefficients in the balanced chemical equation.

For a balanced chemical equation, the general expression for the equilibrium constant K is products over reactants, with the concentration of each species raised to the power of its coefficient in the balanced chemical equation.

The equilibrium constant expression for the given chemical equation A + B → X + Y is ( [X] * [Y] ) / ( [A] * [B] ). This expression represents the ratio of the concentrations of the products (X and Y) to the concentrations of the reactants (A and B), raised to their respective stoichiometric coefficients.

Therefore, the correct answer is E. ( [X] * [Y] ) / ( [A] * [B] ).