Chemical and Ionic Equilibrium 2 Question 56
56. The incorrect statement among the following for this reaction, is
(2016 Adv.)
(a) Decrease in the total pressure will result in the formation of more moles of gaseous $X$
(b) At the start of the reaction, dissociation of gaseous $X_{2}$ takes place spontaneously
(c) $\beta_{\text {equilibrium }}=0.7$
(d) $K_{C}<1$
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Solution:
- In water, $K_{\text {sp }}=4 S^{3}=4\left(6.7 \times 10^{-6}\right)^{3}$
$$ =1.2 \times 10^{-15} $$
In buffer of $\mathrm{pH}=8, \mathrm{pOH}=6,\left[\mathrm{OH}^{-}\right]=10^{-6}$
$$ \begin{aligned} K_{\mathrm{sp}} & =S\left[\mathrm{OH}^{-}\right]^{2} \ S & =\frac{1.2 \times 10^{-15}}{10^{-12}}=1.2 \times 10^{-3} \mathrm{M} \end{aligned} $$
