Which of the following explains why trioxonitrate (V) acid is not used for preparing hydrogen from metals?

Assessment: WAEC SSCE - Chemistry - 1990 (Objective) Subject: Chemistry

Question 1 Report

Which of the following explains why trioxonitrate (V) acid is not used for preparing hydrogen from metals?
Answer Details
Trioxonitrate (V) acid (HNO3) is a strong oxidizing agent that can react with many metals, including those that can react with acids to form hydrogen gas. However, it does not produce hydrogen gas because it oxidizes the metal instead of producing hydrogen gas. The nitrate ion in the HNO3 oxidizes the metal to form an oxide layer on the surface of the metal, rendering it passive. This oxide layer prevents further reaction between the metal and the acid, and as a result, hydrogen gas is not produced. Therefore, trioxonitrate (V) acid is not used for preparing hydrogen from metals.
Read lesson note on Acids, Bases And Salts (JAMB)
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