What are the chemical properties of hydrogen and what properties does hydrogen have

Hydrogen is stable at room temperature, and can react with many substances under the condition of ignition or heating.

Flammability (can be burned in oxygen or chlorine):

2H2 + O2 = Ignition = 2H2O (Chemical Reaction).

To ignite impure hydrogen, it must be verified before igniting hydrogen) H2 + Cl2 = Ignition = 2HCL (chemical reaction).

Reducibility (reducing certain metal oxides).

h2+cuo

Cu + H2O (displacement reaction).

3H2 + Fe2O3 = High temperature = 2Fe + 3H2O (displacement reaction) 3H2 + WO3

W+3H2O (displacement reaction).

Chemical properties of hydrogen.

Flammability. The calorific value is two and a half times that of liquefied petroleum gas. in air ** limit is volume).

It burns with a light blue flame. It is inactive at room temperature, and can react with a variety of substances when heated, such as forming gaseous hydrides with active non-metals; It forms solid hydride with alkali metals, calcium, and iron. Reducible, can be thermally reduced from oxides to moderately reactive or inactive metal powders.

With unsaturated compounds in organic matter, addition or reduction reactions can occur (catalysts, under heating conditions).

2h2 + o2 = ignition = 2h20

Flammable gas, hydrogen mixed with air at a ratio of 4%, occurs during combustion**.

Hydrogen to air is most powerful at a ratio of 2:5**.

1. Reducibility, which can turn copper oxide into copper.

2. Flammability.

Chemical properties of hydrogen.

It is stable at room temperature, and can chemically react with many substances under the condition of ignition or heating.

1. Flammability (can be burned in oxygen or chlorine): 2H2 + O2 = ignition = 2H2O (chemical reaction).

2. Reducibility (reduction of certain metal oxides): H2 + Cuo = Cu + H2O (reduction reaction).

Physical properties of hydrogen:

1. Hydrogen is a colorless gas with a smaller density than air (among all gases, hydrogen has the lowest density.) Under standard conditions, the mass of 1 liter of hydrogen is grams, which is much lighter than air for the same volume).

2. Because hydrogen is insoluble in water, hydrogen can be collected by draining gas collection method.

3. At a pressure of 101 kPa, hydrogen can be converted into a light blue liquid at a temperature; , it becomes a snow-like solid.

4. If hydrogen is adsorbed by metals such as palladium or platinum, it has strong activity (especially adsorption by palladium). Palladium metal has the strongest adsorption effect on hydrogen.

5. When the volume fraction in the air is 4%-75%, it can cause fire source.