Question

At a certain temperature 2 moles of carbon monoxide and 3 moles of chlorine were allowed to reach equilibrium according to the reaction $CO + Cl_{2} \Leftrightarrow CoCl_{2}$in a 5 lit vessel. A t equilibrium if one mole of CO is present then equilibrium constant for the reaction is :

• A. 2
• B. 2.5
• C. 3.0
• D. 4

Answer 1

Answer: (B)

2.5

Answer 2

$$$Atequilbrium$ $\begin{matrix} CO & + & Cl_{2} & \Leftrightarrow & CoCl_{2} \\ 2 & & 3 & & 0 \\ (2 - 1) & & (3 - 1) & & 1 \end{matrix}$ $concentrations$ $\frac{1}{5} \frac{2}{5} \frac{1}{5}$ $$K_{O} = \frac{\left\lbrack C_{O}CI_{2} \right\rbrack}{\left\lbrack C_{O} \right\rbrack\left\lbrack Cl_{2} \right\rbrack} = \frac{1/5}{\frac{1}{5} \times \frac{2}{5}} = \frac{25}{10}orK_{o} = 2.5$$