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Solubility of a gas in water from Henry's law constant and its partial pressure

This type of question, asked 3 times: 14 Jun 2022, 29 Jul 2022, 24 Jan 2026 S2. All 3 questions below, oldest first.

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  1. Question 1

    14 Jun 2022

    142
    A company dissolves 'XX' amount of CO2CO_{2} at 298 K298\text{ }K in 1 litre of water to prepare soda water. X=000‾×10−3 gX = \underline{\phantom{000}} \times 10^{-3}\text{ }g. (nearest integer) (Given: partial pressure of CO2CO_{2} at 298 K=0.835298\text{ }K = 0.835 bar. Henry's law constant for CO2CO_{2} at 298 K=1.67 kbar298\text{ }K = 1.67\ kbar. Atomic mass of HH, CC and OO is 1, 12 and 16 g mol−116\text{ }g\text{ }mol^{-1}, respectively)

  2. Question 2

    29 Jul 2022

    55
    If O2O_{2} gas is bubbled through water at 303 K303\text{ }K, the number of millimoles of O2O_{2} gas that dissolve in 1 litre of water is ____. (Nearest Integer) (Given: Henry's Law constant for O2O_{2} at 303 K303\text{ }K is 46.8246.82 k bar and partial pressure of O2=0.920O_{2} = 0.920 bar) (Assume solubility of O2O_{2} in water is too small, nearly negligible)

  3. Question 3

    24 Jan 2026 S2

    43
    At 298 K , the mole percentage of N2( g)N_{2}(\text{ }g) in air is 80%80\%. Water is in equilibrium with air at a pressure of 10 atm . What is the mole fraction of N2( g)N_{2}(\text{ }g) in water at 298 K ? (KHK_{H} for N2N_{2} is 6.5×107 mmHg6.5 \times10^{7}\text{ }mmHg)

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