Why is trioxonitrate v acid not used for preparing hydrogen from metals
I assume you mean to say nitric acid. Trioxonitrate V acid for HNO3 is rubbish.
The reason HNO3 is not used is because HNO3 is such a strong oxidizing agent that you don't get H2 gas but rather either NO2 gas or NO gas depending upon how strong the HNO3 is.
Trioxonitrate V acid, also known as nitric acid (HNO3), is not typically used for preparing hydrogen from metals because it is an oxidizing agent and can react with hydrogen gas. When metals react with acids, they typically produce hydrogen gas as one of the products. However, nitric acid is a powerful oxidizing agent and can oxidize the hydrogen gas to water, rather than allowing it to be collected separately. This oxidation reaction prevents the production of pure hydrogen gas.
To obtain pure hydrogen gas from metals, you can use dilute acids such as hydrochloric acid (HCl) or sulfuric acid (H2SO4). These acids still react with the metals to produce hydrogen gas, but they are not strong oxidizing agents and do not interfere with the collection of the gas. Additionally, hydrochloric acid and sulfuric acid are commonly used in laboratories and are more readily available compared to nitric acid.
Trioxonitrate V acid, also known as nitric acid (HNO3), is not commonly used for preparing hydrogen from metals due to a few reasons:
1. Oxidizing properties: Nitric acid is a strong oxidizing agent. When it comes into contact with metals, it tends to oxidize them rather than liberate hydrogen gas. This means that the metal would lose electrons in the reaction, forming metal ions, while the hydrogen is not produced.
2. Acidic nature: While nitric acid is an acid, it is not a strong enough acid to readily ionize water and release hydrogen gas. It dissociates into hydrogen ions (H+) and nitrate ions (NO3-) in water, but the concentration of hydrogen ions is relatively low compared to other strong acids like hydrochloric acid (HCl) or sulfuric acid (H2SO4).
3. Nitrogen dioxide formation: When nitric acid reacts with metals, it can produce nitrogen dioxide (NO2) gas instead of hydrogen gas. The reaction depends on the specific metal being used and the concentration of the nitric acid. Nitrogen dioxide is a reddish-brown toxic gas, which further limits the use of nitric acid for hydrogen generation.
As a result, other methods, such as using acids like hydrochloric acid or sulfuric acid or employing processes like electrolysis, are more commonly used for preparing hydrogen from metals.