O2 CO2 chemistry and applications

Oxygen has a supply for breathing. Do cut the metal gas. There is also oxidation. The application is to cut metal. Breathe. There is also supply burning.

Carbon dioxide has the property of not being able to burn. It can be used as a raw material for photosynthesis. Extinguishant.

Carbonic acid is formed when dissolved in water. Acidic. Furthermore.

It can also be reflected with alkali solution. For example. The equation for examining carbon dioxide.

It is reflected with clarified lime water.

O2 is a necessary gas for human beings Food digestion Objects are burned and deteriorated O2 O2 is an oxidant CO2 is also a necessary gas for human beings Solid CO2 is called dry ice is an agent for artificial rainfall The main gas that causes the greenhouse effect is also CO2

O2 has oxidizing properties and can react with metals, non-metals.

CO2 reacts with water to form an acid that can turn the purple litmus solution red.

Carbon dioxide chemical properties:

Carbon dioxide is one of the carbons, which is an inorganic substance, is non-flammable, does not usually support combustion, and is non-toxic at low concentrations. It is also the acid anhydride of carbonic acid, which belongs to acidic oxides, and has the general properties of acidic oxides, in which the valency of carbon elements is +4 valence, which is in the most advanced state of carbon elements, so carbon dioxide has oxidation and no reduction, but the oxidation is not strong.

Wood dioxide carbon chemical properties: carbon dioxide is one of the carbon oxides, is an inorganic, non-flammable, cavity finger tung usually does not support combustion, low concentration is non-toxic. It is also an acid anhydride of carbonic acid, which belongs to the acidic oxide and has the general properties of acidic oxide.

Carbon dioxide is a carbon-oxide compound, the chemical formula is CO2, the chemical formula is, at room temperature and pressure, it is a colorless and odorless or colorless and odorless (no smell) and slightly sour gas, which is also a common greenhouse gas, or one of the components of air (accounting for the total volume of the atmosphere.

In terms of chemical properties, the chemical properties of carbon dioxide are not active, the thermal stability is very high (only decomposition in 2000), can not be burned, usually does not support combustion, belongs to acid oxides, has the general properties of acid oxides, because the reaction with water is carbonic acid, so it is the acid anhydride of carbonic acid, in which the valence of carbon elements is +4 valence, in the most advanced state of carbon elements, so carbon dioxide has oxidation and no reduction, but the oxidation is not strong.

The density is greater than that of air, soluble in water, colorless and odorless gas.

It can make the clarified lime water turbid.

It reacts with water to form carbonic acid.

CO2 reacts with water to form carbonic acid, which is neither combustible nor combustible, and does not support combustion.

The properties of CO2 are as follows:

In terms of physical properties, carbon dioxide has a melting point of a boiling point of being denser than air (under standard conditions) and is soluble in water.

In terms of chemical properties, carbon dioxide is chemically inactive, has high thermal stability (only decomposition in 2000), cannot be burned, and usually does not support combustion.

Carbon dioxide can be dissolved in water and react with water to form carbonic acid, and unstable carbonic acid easily decomposes into water and carbon dioxide. Under certain conditions, carbon dioxide can react with alkaline oxides to form corresponding salts. The addition of carbon dioxide to the clarified lime water will make the clarified lime water turbid, resulting in calcium carbonate precipitates.

At high temperatures, carbon dioxide reacts with carbon elements to form carbon monoxide. Carbon dioxide and hydrogen undergo a series of reactions under the action of catalysts to produce methanol, carbon monoxide, and methane.

Uses of CO2:

1. Used as a chemical solvent. At low temperatures, carbon dioxide easily forms solid dry ice. When the pressure increases to about 10 atmospheres, the dry ice liquefies.

Even at room temperature, when the pressure reaches 80 atmospheres, the macro is still in a liquid state, which can be used as a solvent and chemical cleaning agent for gasoline, carbon tetrachloride, ether, etc., and is an excellent solvent for environmental protection and safety.

2. As a special cleaning agent. Extremely low dry ice temperatures can cause special changes in the solidification and contraction of many substances. For example, the condensation and shrinkage of the grease on the surface of the dirt and fiber are separated to achieve the purpose of secondary pollution-free cleaning.

It is a new and efficient cleaning method, which has special application value in many industries such as aerospace, nuclear energy, shipbuilding, automobile, printing, electric power, mold, etc.

3. It is used to create smoke effects on the stage. In the past, when a smoke effect was required, it was created through the evaporation of polluting aerosols that can easily cause allergies and respiratory infections. It is completely harmless to condense water in the air into "smoke" with dry ice.

o is oxygen and co is carbon dioxide.

Oxygen (oxygen), chemical formula O. Chemical formula: , colorless and odorless gas, the most common elemental form of oxygen. Melting point, boiling point -183 . Not easily soluble in water, about 30ml of oxygen is dissolved in 1L of water.

Oxygen accounts for about 21% of the air. Liquid oxygen is sky blue. Oxygenation is a blue crystal. It is not very active at room temperature, and it is not easy to interact with many substances. However, it is very active at high temperatures and can be directly combined with a variety of elements, which is related to the electronegativity of oxygen atoms second only to fluorine.

Carbon dioxide (carbon dioxide), a carbon oxide, the chemical formula is co, the chemical formula is, at room temperature and pressure, it is a colorless and odorless or colorless and odorless (no smell) and slightly sour gas, which is also a common greenhouse gas, or one of the components of air (accounting for the total volume of the atmosphere.

It can react with water to form carbonic acid, make the purple litmus solution turn red, and make the clarified lime water turbid (this reaction is often used to test CO2, which can react with alkali to form corresponding carbonate and water, and is easy to react with alkaline oxides to form corresponding carbonate. Under normal conditions, it is a colorless, odorless gas, soluble in water, denser than air (commonly collected by upward air exhaust method), solid carbon dioxide is called dry ice, easy to sublimate.

Uses of carbon dioxide

Gas fertilizers. Students who have studied biology know that carbon dioxide is needed as a raw material for photosynthesis in plants. In many farms, CO2 generators are also placed to increase crop yields.

Fire suppression. With the rapid development of science and technology, more and more types of fire extinguishers have appeared. Carbon dioxide fire extinguishers can be used to extinguish fires in books and important equipment, because there is no residue after extinguishing.

Industrial. We only make many chemical products, which need to use carbon dioxide as a chemical raw material, such as calcium carbonate and sodium carbonate that we are more familiar with.