# Problem: Which of the following is true for a system whose equilibrium constant, Kc, is much greater than one?A) The reaction mixture contains mostly products at equilibrium.B) The reaction mixture contains mostly reactants at equilibrium.C) The rate of reaction is very fast.D) The moles of reactants and products are relatively similar at equilibrium.E) Both A and C.

###### FREE Expert Solution

We’re being asked to determine which of the following is true for a system whose equilibrium constant, Kc, is much greater than one.

Recall that the equilibrium constant is the ratio of the products and reactants

We use Kp when dealing with pressure and Kc when dealing with concentration:

$\overline{){{\mathbf{K}}}_{{\mathbf{p}}}{\mathbf{=}}\frac{{\mathbf{P}}_{\mathbf{products}}}{{\mathbf{P}}_{\mathbf{reactants}}}}$     $\overline{){{\mathbf{K}}}_{{\mathbf{c}}}{\mathbf{=}}\frac{\mathbf{\left[}\mathbf{products}\mathbf{\right]}}{\mathbf{\left[}\mathbf{reactants}\mathbf{\right]}}}$

Note that solid and liquid compounds are ignored in the equilibrium expression.

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###### Problem Details

Which of the following is true for a system whose equilibrium constant, Kc, is much greater than one?

A) The reaction mixture contains mostly products at equilibrium.

B) The reaction mixture contains mostly reactants at equilibrium.

C) The rate of reaction is very fast.

D) The moles of reactants and products are relatively similar at equilibrium.

E) Both A and C.