The chemical formula for producing oxygen, what is the chemical formula for oxygen

1.Heating 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

3.Hydrogen peroxide (hydrogen peroxide) in the catalyst MNO2 (or red brick powder, potato, cement, rust, etc.), to produce O2 and H2O, the chemical formula is: 2H2O2===(Mno2) 2H2O+O2

f2+h2o=hf+o2 hclo=hcl+o2 na2o2+h2o=naoh+o2 h2o2=h2o+o2 kclo3=kcl+o2 kmno4=k2mno4+mno2+o2 No trim No conditions written Hope it helps.

Heat potassium chlorate (with a small amount of manganese dioxide): 2kClO3 = mNO2 = 2kCl + 3O2

Heating potassium permanganate: 2kmNO4 = = K2mNO4 + MNO2 + O2

Laboratory oxygen production with hydrogen peroxide: 2H2O2= MNO2= 2H2O+ O2 Heating mercuric oxide: 2Hgo = Heating = 2Hg + O2

2H2O2 = 2H2O + O2 [MnO2 as catalyst] 2kClO3 = 2KCl + 3O2 [Heating by MnO2 as catalyst] 2kmNO4 = K2Mno4 + Mno2 + O2 [Heating] 2CO2 + 2Na2O2 = 2Na2CO3 + O22H2O+2Na2O2=4NaOH+O2 2H2O = 2H2 +O2 [Energized].

The chemical formula of oxygen is O. Oxygen is the element oxygen.

It is a kind of elemental substance, the chemical formula O2, which is chemically active and can react with oxygen with most elements. 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-related.

The Greek word for oxygen means "acid", and the name was given by the French chemist Lavoisier.

The reason for this is Lavoisier's erroneous belief that all acids contain this new gas. Japanese.

The name of oxygen is still "acid".

The Chinese name for oxygen is the name of Xu Life in the Qing Dynasty. He believed that human survival is inseparable from oxygen, so he named it "nourishing qi", that is, "the quality of nourishing qi", and later used "oxygen" instead of "nourishing" for unification, so it was called "oxygen".

<> 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.

The chemical formula of oxygen is O2.

Oxygen is a colorless and odorless gas and is an element of oxygen.

The most common elemental form. 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 call. Liquid oxygen.

for sky blue. Oxygenation is a blue crystal.

Oxygen is most widely distributed in nature, and the mass of the earth's crust is abundant.

The highest element. In the oxidation of hydrocarbons, the treatment of wastewater, rocket propellants.

and oxygen is needed for animals and humans to breathe in aviation, aerospace and diving.

Main uses: 1. Smelting process: In the steelmaking process, high-purity oxygen is blown, and oxygen reacts with carbon, phosphorus, sulfur, silicon, etc.

This not only reduces the carbon content of the steel, but also helps to remove impurities such as phosphorus, sulfur and silicon. In addition, the heat generated during the oxidation process is sufficient to maintain the temperature required for the steelmaking process, so the oxygen blowing not only shortens the smelting time, but also improves the quality of the steel.

Blast furnace ironmaking. , increasing the oxygen concentration in the blast can reduce the coke ratio and increase the yield. In the smelting of non-ferrous metals, the use of oxygen enrichment in the chain group can also shorten the smelting time and increase the output.

2. Chemical industry: In the production of synthetic ammonia, oxygen is mainly used for the oxidation of raw gas to strengthen the process and increase the output of chemical fertilizer. Another example is the high-temperature cracking of heavy oil and the gasification of pulverized coal.

1.Electrolyzed water: 2H2O = energized = 2H2 +O2 2 Potassium chlorate to oxygen 2kclo3 = manganese dioxide = 2kCl 3O2 3 Potassium permanganate to oxygen 2kmNO4= = K2mNO4 + MNO2 + O2 4 Hydrogen peroxide to oxygen 2H2O2 = manganese dioxide = 2H2O+O2 +2CO2 = 2Na2CO3+O2 62Na2O2 .

The equation for the chemical reaction to produce oxygen is as follows:

1. Heat potassium chlorate and manganese dioxide.

2kClO3=2kCl+3O2 (Conditions: MNO2, heating).

2. Heat potassium permanganate.

2kmNO4=K2mNO4+MNO2+O2 (heating).

3. Hydrogen peroxide and manganese dioxide.

2H2O=2H2O+O2 (Condition: Manganese Dioxide).

Junior High School Chemistry

Curriculum and teaching workers in China recognize and clearly explain a basic idea: moral education is not or is not primarily about the education of moral knowledge, in addition to various specialized moral education activities, it needs to rely more on the influence of moral values formed by various disciplines on the basis of their knowledge and methods. Throughout the development process and trend of moral education abroad, this concept has become the consensus of educational theory and practice in all countries in the world.

Introduction to the equation:

The formula or equation for short, is an equation with unknowns. That is, there must be an algebraic formula with one or more unknowns in the equation. An equation is an equation, but an equation is not necessarily an equation. <>

Unknown modulo kernel number: Usually xyz is an unknown number, but other letters can also be set, and all lowercase letters are acceptable.

The law of shift of equations:

Shifting is the process of moving a number from one side of the equal sign to the other side of the equal sign. When moving a number from one side of the equal sign to the other, change the operator symbol in front of the number to the opposite of it.

1. Potassium permanganate to prepare oxygen, medicine: potassium permanganate dark purple solid, and manganese dioxide black powder. The equation for the thermal decomposition of potassium permanganate is controversial because its decomposition products will be different under different temperature conditions.

2. Manganese dioxide and potassium chlorate are co-heated, and potassium chlorate white solid and manganese dioxide black powder. The prepared oxygen contains small amounts of Cl2, O3 and trace amounts of ClO2. This method has been removed from some textbooks.

The reaction is actually an exothermic reaction, not an endothermic reaction, and the above 1mol reaction occurs, and the exothermic reaction is 108kJ.

3. Catalytic decomposition of hydrogen peroxide solution, drug: hydrogen peroxide H2O2 and manganese dioxide black powder mnO2.

Precautions for the preparation of oxygen:

The experiment first checks the air tightness, and the test tube is evenly heated, and the test tube is tilted, which means that when installing the large test tube, the test tube should be slightly tilted, that is, the test tube mouth should be lower than the bottom of the test tube.

This can prevent the small amount of water contained in the drug from turning into water vapor during heating, condensing into water droplets at the nozzle and backflowing, resulting in the rupture of the test tube and uniform heating, which means that the test tube must be evenly heated when heating the test tube.

Remove the catheter first and then move the lamp:

This means that when the oxygen production is stopped, it is necessary to remove the air duct from the water tank first, and then remove the alcohol lamp, if the alcohol lamp is removed first, the temperature in the test tube decreases, the air pressure decreases, and the water will be drawn along the tube to the hot test tube, causing the test tube to burst due to rapid cooling. <>

The specific chemical equation is as follows:

1. Heat potassium permanganate.

The equation for the thermal decomposition of potassium permanganate is controversial because its decomposition products will vary under different temperature conditions.

Reaction equation at the secondary school level.

2kmno ==k mno +mno +o (heating).

2. Decomposition of potassium chlorate.

The prepared oxygen contains a small amount of Cl, O and a trace amount of Clo; The reaction is actually an exothermic reaction, not an endothermic reaction, and the above 1mol reaction occurs, and the exothermic reaction is 108kJ.

2kCl ==2kCl+3O speed (MNO catalytic heating).

3. Hydrogen peroxide decomposition.

Catalytic decomposition of hydrogen peroxide solution (the catalyst is mainly manganese dioxide, ferric oxide, copper oxide can also be used).

2H O ==2H O+O (MNO catalysis).

Precautions for the production of oxygen from potassium permanganate:

The mouth of the test tube is slightly tilted downward: to prevent the condensate from flowing back to the bottom of the test tube and bursting the test tube;

The drug is laid flat at the bottom of the test tube: preheated, after which the outer flame of the alcohol lamp can be directed heated in the area containing the drug.

The iron clamp is clamped about 1 3 places away from the nozzle;

The catheter should be slightly exposed with a rubber stopper: it facilitates the discharge of the gas (approximately;

A ball of cotton should be placed at the mouth of the test tube: to prevent potassium permanganate powder from entering the catheter and blocking the catheter, so that the prepared gas can not be discharged well;

When the drainage method is collected, the air in the test tube is collected when the bubbles are evenly and continuously discharged, and the collected gas is impure at this time;

At the end of the experiment, remove the catheter first, and then extinguish the alcohol lamp: to prevent the cold water in the sink from sucking into the hot test pin tube and causing the test tube to burst;

When collecting gas using the upward exhaust method, the catheter extends to the bottom of the cylinder: in order to exhaust the air.

Precautions for hydrogen peroxide hydrogen peroxide to produce oxygen:

The neck of the long-necked funnel should be sealed below the liquid level: to prevent gas leakage from the long-necked funnel, the separating funnel can be used instead to control the reaction rate;

The catheter should be slightly exposed with a rubber stopper: it is easy for the gas to drain out. <>