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18 March, 17:48

A saturated solution of sulfur dioxide is prepared by dissolving SO2 (g) in 100. g of water at 10.°C and standard pressure.

Determine the mass of SO2 in this solution.

A.) 15g to 18g

B.) 40g to 43g

C.) 53g to 56g

D.) 6g to 8g

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  1. 18 March, 18:07
    0
    The correct option is;

    A.) 15 g to 18 g

    Explanation:

    The solubility of sulfur dioxide at room temperature = 94 g/L of water forming sulfurous acid as follows;

    SO₂ + H₂O ⇄ HSO₃⁻ + H⁺

    Which is a partial reversibly association with water molecules

    Whereby 1 liter of water weighs 1 kg

    9.4 gram of SO₂ will dissolve in 100 g of water at room temperature of 23 to 24°C

    The solubility increases as the temperature reduces therefore as shown from the sulfur dioxide solubility chart we have;

    At 10°C the solubility of SO₂ (g) is midway between 150 g to 200 g per kg of water

    Therefore;

    The solubility of SO₂ (g) is between 15 g to 18 g per 100 of water.
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