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?

  • Direct combination of constituent elements
  • Double decomposition involving a salt solution
  • Reaction between an anhydride and water checkmark
  • Reaction between a base and an amphoteric oxide
  • Dissolution of hydroxides followed by neutralization

The correct answer is: C

Explanation

There are several methods of preparation of acids. These include the following:

1. By the reaction between an acidic oxide of a non-metal (acid anhydride) and water.

SO2(g) + H2O(l) → H2SO3(aq) Trioxosulphate(IV)

P4010(s) + 2H2O(l) → 4HPO3(aq) Trioxophosphate(V)
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