Question

The gas $A_2$ in the left flask allowed to react with gas $B_2$ present in right flask as $A_2\left(g\right)+B-2\left(g\right)\rightleftharpoons 2AB\left(g\right):K_c=4$ at ${27}^{0}c$. What is the concentration of AB when equilibrium is established?

Answer 1

$\begin{array}{c}32+4x^2-24x=4x^2\\ 24x=32\Rightarrow x=\frac{32}{24}\Rightarrow \frac{4}{3}\Rightarrow 1.33\\ AB=2x\Rightarrow 2.66moles\\ \left[AB\right]=\frac{no.ofmoles}{Vol.ofsolution/\left(g\right)}\Rightarrow \frac{2.66}{3}\Rightarrow 0.89M\end{array}$