Question

Consider the following statements:

I. SO2(g) + H2O(l) forms H2SO3(aq), indicating an acidic solution.
II. CO2(g) + H2O(l) forms H2CO3(aq), indicating an acidic solution.
Identify which statements are correct and which are incorrect, and provide a brief explanation for your choice.

Answer 1

Statement I is incorrect because SO2 does not form an acidic solution in water. Statement II is correct because CO2 forms an acidic solution in water.

Step-by-step explanation:

Statement I: SO2(g) + H2O(l) forms H2SO3(aq), indicating an acidic solution. This statement is incorrect.

Statement II: CO2(g) + H2O(l) forms H2CO3(aq), indicating an acidic solution. This statement is correct.

Explanation: When carbon dioxide dissolves in water, it forms carbonic acid, which is a weak acid. This makes the solution slightly acidic. However, when sulfur dioxide dissolves in water, it forms sulfurous acid, which is also a weak acid. Therefore, the correct statement is II.