because it does not last
Zinc liberates hydrogen gas when treated with dilute HNO3.
The word equation for the preparation of hydrogen gas is: metal + acid → salt + hydrogen gas. For example, when hydrochloric acid reacts with zinc, it produces zinc chloride salt and hydrogen gas.
Calcium is not used in the lab preparation of hydrogen because it reacts with water to form calcium hydroxide and hydrogen gas, making it an inefficient method for producing pure hydrogen. Other methods such as using metals like zinc or aluminum are preferred for lab preparation of hydrogen as they do not form unwanted byproducts.
Potassium is not used in the preparation of hydrogen because it is a highly reactive metal that reacts vigorously with water to form potassium hydroxide and hydrogen gas. This reaction can be dangerous due to the high reactivity of potassium, making it unsuitable for the controlled generation of hydrogen gas. Sodium is often used instead as it reacts less violently with water.
Lead is not used for the preparation of hydrogen because it is not reactive enough to displace hydrogen from water or acids. Other metals like zinc or aluminum are commonly used because they react more readily with acids or water to produce hydrogen gas. Lead's lack of reactivity makes it unsuitable for this purpose.
Zinc liberates hydrogen gas when treated with dilute HNO3.
The word equation for the preparation of hydrogen gas is: metal + acid → salt + hydrogen gas. For example, when hydrochloric acid reacts with zinc, it produces zinc chloride salt and hydrogen gas.
Calcium is not used in the lab preparation of hydrogen because it reacts with water to form calcium hydroxide and hydrogen gas, making it an inefficient method for producing pure hydrogen. Other methods such as using metals like zinc or aluminum are preferred for lab preparation of hydrogen as they do not form unwanted byproducts.
Potassium is not used in the preparation of hydrogen because it is a highly reactive metal that reacts vigorously with water to form potassium hydroxide and hydrogen gas. This reaction can be dangerous due to the high reactivity of potassium, making it unsuitable for the controlled generation of hydrogen gas. Sodium is often used instead as it reacts less violently with water.
Lead is not used for the preparation of hydrogen because it is not reactive enough to displace hydrogen from water or acids. Other metals like zinc or aluminum are commonly used because they react more readily with acids or water to produce hydrogen gas. Lead's lack of reactivity makes it unsuitable for this purpose.
It is because nitric acid is a strong oxidising agent (because it decomposes to yield nascent oxygen as:2HNO3 →2NO2 + H2O + [O])and it oxidises the hydrogen formed to water.Only 1% dilute and cold nitric acid reacts with magnesium and manganese to liberate Hydrogen gas.
A strong acid like nitric (HNO3), hydrochloric (HCL), sulfuric (H2SO4) to name a few.
When magnesium (Mg) reacts with nitric acid (HNO3), it produces magnesium nitrate (Mg(NO3)2) and hydrogen gas (H2).
Nitric acid is a strong oxidizing agent that can react violently with reducing agents such as hydrogen, leading to potential explosions. This makes it unsafe to use nitric acid in the lab for the preparation of hydrogen gas. Preferred methods for generating hydrogen gas typically involve non-oxidizing acids like hydrochloric acid reacting with a metal like zinc.
If it was a reaction between sodium hydroxide and an unknown acid the acid would be nitric acid (HNO3)
Another reagent that can be used to precipitate cations of the silver group is hydrochloric acid (HCl).
Zeppelins used hydrogen gas as the lifting gas to make them buoyant in the air.