What is the solubility of a gas in water at $25^{\circ} \mathrm{C}$ if partial pressure is $0.18…

What is the solubility of a gas in water at $25^{\circ} \mathrm{C}$ if partial pressure is $0.18 \mathrm{~atm}$ ? $\left(\mathrm{K}_{\mathrm{H}}=0.16 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~atm}^{-1}\right)$
  1. $0.029 \mathrm{~mol} \mathrm{dm}^{-3}$
  2. $0.022 \mathrm{~mol} \mathrm{dm}^{-3}$
  3. $0.032 \mathrm{~mol} \mathrm{dm}^{-3}$
  4. $0.038 \mathrm{~mol} \mathrm{dm}^{-3}$

Solution

$\begin{aligned} \mathrm{S} & =\mathrm{K}_{\mathrm{H}} \times \mathrm{P} \\ & =0.16 \times 0.18 \\ & =0.0288 \mathrm{~mol} \mathrm{dm}^{-3}\end{aligned}$

Asked in: MHT CET 2023 (10 May Shift 2)

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