What substances produce oxygen and what substances produce oxygen

Laboratory method 1Heating potassium permanganate, the chemical formula is: 2kmNO4===( )K2mNO4+MNO2+O2 2

Potassium chlorate was heated with catalyst MNO2 with the chemical formula 2kClO3===( , mNO2) 2kCl+3O2 3Hydrogen peroxide (hydrogen peroxide) in the catalyst Mno2 (or red brick powder, potato, cement, rust, etc.) to generate O2 and H2O with the chemical formula:

2H2O2===(MNO2) 2H2O+O2 The preparation of oxygen can also be made with sodium peroxide (Na2O2 reacts with water to generate sodium hydroxide and oxygen) In addition, potassium chlorate is heated to produce potassium chloride and oxygen, sulfur trioxide decomposition can also generate oxygen, hypochlorous acid can also generate oxygen and chlorine under the catalysis of heating and manganese dioxide, and there is electrolysis of water Industrial manufacturing oxygen method 1Compressed cooling air 2Oxygen production method in nuclear submarine by molecular sieve 2Na2O2+2CO2===2Na2CO3+O2 Advantages of this method:

1. Carry out at room temperature 2. Make oxygen and carbon dioxide form a cycle (people consume oxygen and exhale carbon dioxide, and this reaction consumes carbon dioxide to produce oxygen) The method of producing oxygen in spacecraft uses the carbon dioxide gas exhaled by astronauts to react with potassium superoxide to produce oxygen for astronauts to breathe. Physical oxygen production Oxygen is produced through an oxygen-rich membrane, so that the air**, according to the different activity rates of nitrogen and oxygen, extracts a sufficient concentration of oxygen through the oxygen-enriched membrane. Note:

A concentration of 30 percent of the oxygen content is the best concentration for the body and is called the oxygen-rich state.

As long as there is a substance that contains oxygen, it is possible to produce oxygen. 1. Heating the mixture of potassium chlorate and manganese dioxide 2kclo3 === heating mno2 === 2 kcl + 3 o2 2. heating potassium permanganate 2 kmno4 === heating ==== k2mno4 + mno2 + o2 3. decomposition of hydrogen peroxide under the catalysis of manganese dioxide 2 h2o2 == mno2 === 2 h2o + o2 4. electrolysis of water 2 h2o=== energized ===h2 + o2 and so on.

1. Mno2 (manganese dioxide: used as a catalyst) is added to H2O2 (hydrogen peroxide) to quickly produce oxygen;

2. Electrolysis of water to produce oxygen and hydrogen;

3. KMNO4 (potassium permanganate) is directly heated to generate oxygen. potassium manganate and pure manganese dioxide;

4. KCLO3 (potassium chlorate) and manganese dioxide are mixed and heated, manganese dioxide is used as a catalyst, and potassium chlorate is decomposed into potassium chloride and oxygen;

5. Na2O2 (sodium peroxide) is added to water to generate sodium hydroxide and oxygen;

6. Na2O2 (sodium peroxide) plus spine dioxide to produce sodium carbonate and oxygen.

1. Manganese dioxide is added to hydrogen peroxide as a catalyst to quickly produce oxygen;

2. Electrolysis of water to produce oxygen and hydrogen;

3. Potassium permanganate is directly added to accompany the heat, and the Zen chaos produces oxygen, potassium manganate and manganese dioxide;

4. Sodium peroxide plus carbon dioxide to produce sodium carbonate and oxygen.

hydrogen peroxide) with the addition of mnO2 (manganese dioxide: as a catalyst) to rapidly produce oxygen.

2.Electrolysis of water to produce oxygen and hydrogen.

potassium permanganate) is directly heated to produce oxygen. Potassium manganate and manganese dioxide.

Potassium chlorate) and manganese dioxide are mixed and heated, manganese dioxide acts as a catalyst, and potassium chlorate is decomposed into potassium chloride and oxygen.

Sodium peroxide) is added to water to produce sodium hydroxide and oxygen.

sodium peroxide) plus carbon dioxide to produce sodium carbonate and oxygen.

The laboratory generally uses the first type.

Oxygen is made up of the element oxygen.

Oxygen, the element symbol O, is located in the second period of the periodic table in group A. In 1774, British scientist Joseph Priest used a lens to focus sunlight on mercury oxide and discovered a gas that could strongly help combustion.

Antoine-Laurent Lavoisier studied this gas and correctly explained its role in combustion. Oxygen is the most abundant and widely distributed element in the earth's crust, and it is also the most important element in the biotic and non-biotic worlds. Elemental oxygen accounts for in the atmosphere.

Oxygen is made up of oxygen molecules. 2 oxygen atoms combine into one oxygen molecule. Oxygen (chemical formula:

O2), 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.

Composed of the element oxygen. Microscopically speaking, oxygen is made up of oxygen molecules.

What are common substances made of.

Elemental gases composed of the element oxygen.

A water molecule contains two hydrogen atoms and one oxygen atom, and when the water molecule is electrolyzed, the water molecule is split into hydrogen atoms and oxygen atoms, and the hydrogen atoms and oxygen atoms are recombined to form oxygen molecules and hydrogen molecules. The oxygen that people breathe on the earth is essentially the decomposition of water, but it is through the photosynthesis of plants, seaweed, and some phytoplankton on the earth to break down water molecules. In photosynthesis, plants absorb carbon dioxide, release oxygen, and produce glucose.

The hydrogen produced in photosynthesis is involved in the production of sugar, and oxygen is released into the atmosphere. Therefore, if humans can master the method of producing oxygen in plants, the significance is undoubtedly far-reaching, and the by-product of the process of photosynthesis produced by plants is food for us (sugar, which is an important substance for sustaining life activities). The process of photosynthesis in plants is very delicate, which is also one of the characteristics of life activities.

Hydrogen produced by electrolysis of water can react with carbon dioxide produced by astronauts to produce water and methane (biogas). Water can re-engage in electrolysis to make oxygen. Methane and the remaining hydrogen are emitted into space.

Scientists have always wanted this cycle to be completely closed, without wasting a single substance, or for the emissions of hydrogen and methane to generate thrust that can be used to adjust the spacecraft's attitude.

Once upon a time, the earth had very small amounts of oxygen, and the surface of the earth was in very poor condition. The atmosphere is mainly N2 and CO2, and later, through complex changes, anaerobic organisms began to appear on the earth. Under the influence of life, the earth's oxygen began to accumulate continuously.

Later algae appeared, and under the action of various (it must be noted that various) organisms began to accumulate oxygen.

Plants photosynthesize, absorb carbon dioxide and release oxygen.

2H2O2 H2O O2 conditional heating with manganese dioxide 2kclo3 2kcl 3O2 and manganese dioxide 2kmNO4 K2mno4 mno2 O2 conditional heating.

2na2o2+2co2==2na2co3+o2

2na2o2+2h2o==4naoh+o2