# Problem: Consider the reaction of A to form B: 2A(g) ⇌ B(g); Kc = 1.9 × 10−5 (at 298 K)A reaction mixture at 298 K initially contains [A] = 0.60 M. What is the concentration of B when the reaction reaches equilibrium?

###### FREE Expert Solution

We’re given the following equilibrium reaction:

2 A(g) ⇌ B(g); Kc = 1.9 × 10−5 (at 298 K)

From this, we can construct an ICE table:

The Kc expression for the reaction is:

$\overline{){{\mathbf{K}}}_{{\mathbf{c}}}{\mathbf{=}}\frac{\mathbf{product}}{\mathbf{reactant}}{\mathbf{=}}\frac{\left[B\right]}{{\left[A\right]}^{\mathbf{2}}}}$

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###### Problem Details

Consider the reaction of A to form B: 2A(g) ⇌ B(g); Kc = 1.9 × 10−5 (at 298 K)
A reaction mixture at 298 K initially contains [A] = 0.60 M. What is the concentration of B when the reaction reaches equilibrium?