Question

$10$ moles of a mixture of $CO\left(g\right)$ and was mixed with 22 moles of $O_2$ gas and subjected to sparking. Find the moles of gas absorbed when the residual gases are passed through alc. $KOH$.

Answer 1

$2CO+O_2⟶2C{O}_2$

$10$mol $22$mol

The ratio $\frac{n}{SC}=\frac{mole}{stiochcoeff}⟶$lowest$⟶$limiting reagent

$CO\frac{n}{SC}=\frac{10}{2}=\frac{5}{1}$ Thus $CO$ is the limiting reagent

$O_2\frac{n}{SC}=\frac{22}{1}$

$2$mol of $CO$ react with $2$mol of $C{O}_2$

$2$mol of $CO⟶2$mol of $C{O}_2$

$1$mol of $CO⟶$$\frac{2}{2}$mol of $C{O}_2$

$1$mol of $CO⟶$$\frac{2}{2}$x$10$mol of $C{O}_2$

$⟶10molofC{O}_2$

Thus $10$moles of gas is absorbed.