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Which of the following is a general method of preparing acids?

Chemistry
WAEC 1997

Which of the following is a general method of preparing acids?

  • A. Direct combination of constituent elements
  • B. Reaction between a base and an amphoteric oxide
  • C. Double decomposition involving a salt solution
  • D. Reaction between an anhydride and water
  • E. Dissolution of hydroxides followed by neutralization
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Correct Answer: Option D
Explanation

The correct answer is D - Reaction between an anhydride and water.

This is a general method of preparing acids, where an anhydride (a compound that lacks water) reacts with water to form an acid. For example:

                          SO\(_3\) + H\(_2\)O → H\(_2\)SO\(_4\)

                          CO\(_2\) + H\(_2\)O → H\(_2\)CO\(_3\)

This method is commonly used to prepare various types of acids, including inorganic acids like sulfuric acid, nitric acid, and phosphoric acid.


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