Question

Which of the following gas when dissolved in water does not follow Henry’s Law from H2,He,O2,SO2

Answer 1

Sulfur Dioxide (SO2) gas does not follow Henry’s Law when it is dissolved in water.

- When SO2 gas is dissolved in water, it combines with water to form Sulfurous acid (H2SO3).

- Due to this reason, SO2 will not follow Henry's law on dissolving in water.

- All the three other gases (H2, He and O2) do not show any such behaviour and simply follow Henry's law.

Answer 2

Explanation:

Among the four options given, the gas that does not follow Henry's law when dissolved in water is Sulpher Dioxide, it is because the gas itself reacts with water to form a weak acid and partial pressure does not remain co-relational.

According to Henry's law, the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid.

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