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Henry's law calculations: solubility, pressure and Henry's constant

This type of question, asked 13 times: May 2022 S1, 10 May 2023 S2, 15 May 2023 S1, 10 May 2024 S2, 12 May 2024 S2, 14 May 2024 S2, 20 Apr 2025 S1, 11 Apr 2026 S1, 11 Apr 2026 S2, 19 Apr 2026 S2, 14 May 2026 S1, 15 May 2026 S2, 19 May 2026 S2. All 13 questions below, oldest first.

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  1. Question 1

    May 2022 S1

    55
    Calculate the solubility of a gas in water at 0.8 atm and 25°C. [Henry's law constant is 6.85×10−46.85 \times 10^{-4} mol dm−3^{-3} atm−1^{-1}]

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  2. Question 2

    10 May 2023 S2

    76
    Calculate the solubility of a gas having partial pressure 0.15 bar at 25∘C25^\circ C. KH=0.16 mol dm−3 bar−1K_H = 0.16\,\text{mol}\,\text{dm}^{-3}\,\text{bar}^{-1}

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  3. Question 3

    15 May 2023 S1

    80
    Calculate Henry's law constant if solubility of gas in water at 25∘C25^{\circ}\text{C} is 5.14×10−45.14\times10^{-4} mol dm−3^{-3} and partial pressure of the gas is 0.75 bar above solution.

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  4. Question 4

    10 May 2024 S2

    55
    What is the solubility of a gas in water at 25∘C25^\circ C if partial pressure is 0.18 atm? (KH=0.16 mol dm−3 atm−1)(K_H=0.16\,\text{mol dm}^{-3}\,\text{atm}^{-1})

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  5. Question 5

    12 May 2024 S2

    70
    What is the solubility of gas in water at 25°C25°C if partial pressure is 0.346 bar? [Henry's law constant is 0.1590.159 mol dm⁻³ bar⁻¹]

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  6. Question 6

    14 May 2024 S2

    61
    Calculate Henry's law constant KHK_H if the solubility S=0.028 mol dm−3S = 0.028\,\text{mol dm}^{-3} at pressure P=0.346 barP = 0.346\,\text{bar}.

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  7. Question 7

    20 Apr 2025 S1

    89
    Calculate the concentration of dissolved gas in water at 25∘C25^{\circ}C if partial pressure of gas at same temperature is 0.15 atm. [ KH=0.15 moldm −3 atm−1K_{H}= 0.15\text{ }moldm\ ^{- 3}{\text{ }atm}^{- 1} ]

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  8. Question 8

    11 Apr 2026 S1

    21
    The solubility of N2\mathrm{N_2} gas in water at 25∘C25^\circ\mathrm{C} and 11 bar is 6.85×10−4 mol L−16.85 \times 10^{-4}\ \mathrm{mol\,L^{-1}}. Calculate the solubility of N2\mathrm{N_2} gas in water at the same temperature when the partial pressure of N2\mathrm{N_2} is 0.700.70 bar

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  9. Question 9

    11 Apr 2026 S2

    23
    The partial pressure of a gas at 25∘25^\circC is 0.180.18 atm, calculate the concentration of the gas dissolved at the same temperature, If KHK_H is 0.15 mol dm−3 atm−10.15\ \mathrm{mol\,dm^{-3}\,atm^{-1}}

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  10. Question 10

    19 Apr 2026 S2

    28
    Calculate the solubility of certain gas in solvent with pressure 33 atm at 25 ∘C25\ ^\circ\mathrm{C} (Henry's law constant is 3.0×10−2 mol dm−3 atm−13.0 \times 10^{-2}\ \mathrm{mol\,dm^{-3}\,atm^{-1}})

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  11. Question 11

    14 May 2026 S1

    19
    Calculate the solubility of gas in water at 152152 mm of Hg and at 300300 K, if Henry's law constant for same gas at same temperature is 0.16 mol L−1atm−10.16\ \mathrm{mol\,L^{-1}atm^{-1}}.

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  12. Question 12

    15 May 2026 S2

    20
    The solubility of N2\mathrm{N_2} gas in water at 25∘C25^\circ C and 11 bar is 6.85×10−4 mol L−16.85 \times 10^{-4}\ \mathrm{mol\ L^{-1}}. Calculate the molarity of N2\mathrm{N_2} gas dissolved in water under atmospheric conditions when the partial pressure of N2\mathrm{N_2} in atmosphere is 0.500.50 bar.

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  13. Question 13

    19 May 2026 S2

    24
    Find the solubility of organic compound R-X in water at 25∘C25^\circ\mathrm{C} and at 130130 mmHg, if Henry's law constant for that organic compound is 0.160 mol L−1 bar−10.160\ \mathrm{mol\ L^{-1}\ bar^{-1}} at that temperature.

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