What are the reaction equations for laboratory produced oxygen?

The decomposition reaction equations are:

Water decomposes under the action of direct current [2H2O== energized ==2H2 +O2] Phenomenon: Air bubbles are generated on the electrode, v(h2):v(o2)=2:

1. The gas (O2) produced by the positive electrode can rekindle the wooden strip with sparks, and the gas (H2) produced by the negative electrode can burn in the air to produce a light blue flame.

Heating basic copper carbonate [Cu2(OH)2CO3== ==2CuO+CO2 +H2O] Phenomenon: The green powder turns black, the inner wall of the test tube is formed with water mist or water droplets, and the clarified lime water becomes turbid.

Heating potassium chlorate and manganese dioxide to produce oxygen: [2kclo3==mno2 catalyzed and ==2kcl+3o2] Phenomenon: There are bubbles generated, and the wooden strips with sparks are re-ignited.

Heating potassium permanganate to oxygen: [2kmNO4== ==K2mNO4+mNO2+O2] Phenomenon: There are bubbles generated, and the wooden strips with sparks are re-ignited.

Hydrogen peroxide for oxygen production in the laboratory: [2H2O2==Mno2 catalysis or ==O2 +2H2O] Phenomenon: There are bubbles generated, and the wooden strips with sparks are rekindled.

Heating mercury oxide: [2hgo== ==2hg+o2] Phenomenon: red turns silvery-white, and the wooden strip with sparks rekindles.

Carbonic acid is unstable and decomposes: [H2CO3====CO2 +H2O] Phenomenon: There are bubbles generated, and the litmus test solution turns from red to purple.

Oxygen is produced in the laboratory, usually with potassium permanganate, potassium chlorate, hydrogen peroxide, and the chemical equations of the reaction are:

1. Heating potassium permanganate, the chemical formula is:

2kmno k mno mno o (heating) 2, use catalyst mno2 and heat potassium chlorate, the chemical formula is:

2KCro 2KCl + 3O (heating, MNO) 3, hydrogen peroxide (hydrogen peroxide) in the catalyst MNO (or red brick powder, potato, cement, rust, etc.), to generate O and H O, the chemical formula is:

2h₂o₂＝（mno₂）₂h₂o+o₂↑

Main uses of potassium permanganate:1. In the production of chemicals, it is widely used as an oxidant, such as an oxidant for saccharin, vitamin C, isoniazid and benzoic acid;

2. It is used as a preservative, disinfectant, deodorant and antidote in medicine;

3. In water purification and wastewater treatment, it is used as a water treatment agent to oxidize hydrogen sulfide, phenol, iron, manganese and organic, inorganic and other pollutants to control odor and decolorization.

4. It is also used as bleach, adsorbent, colorant and disinfectant.

Three ways to produce oxygen in the laboratory.

There are generally three ways to produce oxygen in the laboratory.

1) Heat potassium chlorate and manganese dioxide with the chemical equation of 2kclo3 mno2△＝2kcl+3o2↑．

2) Potassium permanganate, the chemical equation is: 2kmNO4 K2MNO4+MNO2+O2

3) Hydrogen peroxide and manganese dioxide, the chemical equation is: 2H2O2 Mno2 2H2O+O2

Oxygen produced in the laboratory is commonly obtained as follows.

1. Heat potassium permanganate.

2kmNO4 = = K2mNO4 + MNO2 + O2 2, use catalyst Mno2 and heat potassium chlorate.

2kCl = (mNO) = 2kCl + 3O 3, catalyze hydrogen peroxide with catalyst Mno2.

2h₂o₂=(mno₂)=2h₂o+o₂↑

Potassium chlorate is heat-decomposed into potassium chloride and oxygen under the catalysis of manganese dioxide

2kclo3=(mNO2)2kCl+3O2 Potassium permanganate decomposes into potassium manganate, manganese dioxide and oxygen under heating conditions

2kmNO4 = (heating) K2mNO4 + MNO2 + O2

Laboratory-produced oxygen, 2kClO3=2kCl+3O2, mNO2 catalyst.