You mix reagents (A, B, C, D)so that each is present at an initial concentration of 0.5M. The equilibrium constant for the reaction K_eq is 4. Which choice represents the final concentrations of each reagent $ \frac{[\mathrm{C}][\mathrm{D}]}{[\mathrm{A}][\mathrm{B}]} $ once equilibrium is achieved?

Question

Quizplus · Accepted Answer

Given the equilibrium constant $K = 4$ and initial concentrations of 0.5M for A, B, C, and D, the correct choice must satisfy the equation $K = \frac{[C][D]}{[A][B]} = 4$. Choice A, with concentrations of 0.67M for C and D and 0.33M for A and B, correctly satisfies this equation because $\frac{(0.67)(0.67)}{(0.33)(0.33)} = 4$.

You Mix Reagents (A, B, C, D)so That Each Is [C][D][A][B] \frac{[\mathrm{C}][\mathrm{D}]}{[\mathrm{A}][\mathrm{B}]} [A][B][C][D]​

You Mix Reagents (A, B, C, D)so That Each Is $\frac{[\mathrm{C}][\mathrm{D}]}{[\mathrm{A}][\mathrm{B}]}$