What are the chemical properties of hydrogen and what are the properties of hydrogen?

Since hydrogen (H2) is a gas with a low density, injecting hydrogen into a balloon can make it float in the airHydrogen is a colorless gas that is less dense than air (among all gases, hydrogen is the least dense). Under standard conditions, the mass of 1 liter of hydrogen is grams, which is much lighter than air).

Flammability: When hydrogen is burned in the air, it actually reacts with oxygen in the air to produce water. 2H2 + O2 = 2H2O (ignition).

Reductiveness. Hydrogen reacts with copper oxide, turning copper oxide into red metallic copper. Cuo + H2 = Cu + H2O (heating).

Flammability: Pure hydrogen burns quietly in the air, and impure hydrogen ignition occurs.

**。2) Reducibility: Hydrogen captures the oxygen in some metal oxides and reduces the metal.

3) Stability: The chemical properties of hydrogen are stable at room temperature.

Since hydrogen (hydrogen, H2) is a less dense gas, to: Under standard conditions, the mass of 1 liter of hydrogen is grams, which is much lighter than air).

Flammability is counted as one, and any colorlessness is physical.

1.Flammability.

2。Reductiveness.

What else?

The details are as follows:

Physical properties of hydrogen: hydrogen is a colorless gas with a smaller density than air, at a pressure of 101 kPa, at a temperature, hydrogen can be converted into a colorless liquid; , it becomes a snow-like solid. At room temperature, hydrogen is very stable and does not easily react with other substances.

Chemical properties of hydrogen:

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

Ignition of impure hydrogen gas can occur**, it must be verified before igniting hydrogen, similarly, deuterium (heavy hydrogen) ignition in oxygen can produce heavy water.

H2 + Cl2 = ignition = 2HCl (chemical reaction).

H2+F2=2HF (hydrogen and fluorine gas are mixed immediately** to form hydrogen fluoride gas).

Reducibility (reducing certain metal oxides).

H2 + Cuo = Cu + H2O (displacement reaction).

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

3H2 + WO3W + 3H2O (displacement reaction).

Uses of Hydrogen:

Hydrogen is the main industrial raw material, and it is also the most important industrial gas and special gas, which has a wide range of applications in petrochemical, electronic industry, metallurgical industry, food processing, float glass, fine organic synthesis, aerospace, etc. At the same time, hydrogen is also an ideal secondary energy source.

In general, hydrogen is readily bound to oxygen. This property makes it a natural reducing agent for use in production to prevent oxidation. In high-temperature processing of glass manufacturing and in the manufacture of electronic microchips, hydrogen is added to nitrogen shielding gas to remove residual oxygen.

In the petrochemical industry, hydrogenation is required for refining by desulfurization and hydrocracking**.

Another important use of hydrogen is the hydrogenation of fats in margarine, cooking oils, shampoos, lubricants, household cleaners, and other products. Due to the high fuel properties of hydrogen, the space industry uses liquid hydrogen as fuel.

First, the chemical properties of hydrogen.

Hydrogen is stable at room temperature, and can carry 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 = plus middle lift tremor = Cu + H2O.

Second, the 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.

3. Uses: 1. It can be used for meteorological detection in the meteorological department for the filling of hydrogen balloons.

2. It can be used as a propellant for aerospace fuel in the aerospace field.

3. Reducing agent for chemical reactions, hydrogenation reactions in petrochemical reactions, etc.

4. Newly developed hydrogen energy fields, such as hydrogen energy vehicles, hydrogen energy engines, hydrogen energy boilers, etc., are all under research and development.