What is the solubility of gas in water at $25^{\circ} \mathrm{C}$ if partial pressure is 0.346 bar [Henry's…

What is the solubility of gas in water at $25^{\circ} \mathrm{C}$ if partial pressure is 0.346 bar [Henry's law constant is $\left.\quad 0.159 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{bar}^{-1}\right]$ ?
  1. $0.055 \mathrm{~mol} \mathrm{dm}^{-3}$
  2. $0.028 \mathrm{~mol} \mathrm{dm}^{-3}$
  3. $0.083 \mathrm{~mol} \mathrm{dm}^{-3}$
  4. $0.11 \mathrm{~mol} \mathrm{dm}^{-3}$

Solution

$\begin{aligned} \mathrm{S}=\mathrm{K}_{\mathrm{H}} \mathrm{P} & =0.159 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{bar}^{-1} \times 0.346 \mathrm{bar} \\ & =0.055 \mathrm{~mol} \mathrm{dm}^{-3}\end{aligned}$

Asked in: MHT CET 2023 (12 May Shift 2)

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