How is oxygen prepared?

Answer 1

Oxygen can be prepared by decomposition of Hydrogen peroxide(H2O2), catalyzed by Manganese dioxide(MnO2).

2 H2O2 ---MnO2---> 2 H2O + O2

In addition, electrolysis of water will also produce oxygen at one electrode and hydrogen at the other electrode.

Answer 2

There are a few different methods that are used to prepare oxygen for different purposes. To prepare oxygen you can pressurize it, heat it, or mix it with other substances such as trace amounts of carbon to stabilize it.

Answer 3

Making pure atmospheric gases is fairly easy if you've got the right equipment. It works because when you compress air it heats up because the molecules in it are excited, and when you decompress air it cools down. If you were to take the heated compressed air and cool it before you decompress it, the decompression cooling will drop the temperature of the gas below its condensation point. The process is as follows: compress air.
cool the compressed air. Decompressing air reduces its temperature by a known amount, so they cool the air to the point where decompressing it will lower its temperature to -183C, the condensation temperature of oxygen. Some plants require several compress-decompress cycles to get the gas cold enough to condense.
collect the condensed oxygen and store it in a Dewar flask.
At this point you've got liquid oxygen. This is a very useful product on its own--concentrated liquid oxygen is more cost-effective to transport than is gaseous oxygen, so if they need to move it from the gasification plant to a dealer's warehouse, that's how they move it. It's good for military applications too--they put a small tank of it in fighter planes, heat it up and supply the oxygen to the pilot for breathing. Some hospitals get it this way too--they can heat it up for patients to breathe, and store a lot more oxygen in liquid form than they could ever store as compressed gas. When they've removed oxygen from the air, they have a gas mixture with other valuable gases, like nitrogen, and to recover them they just continue the compress/cool/decompress cycle until all the valuable gases have been removed.

Answer 4

Oxygen can be prepared in the laboratory by red mercuric oxide, or by heating Potassium Chlorate in a test tube in the presence of Maganesedioxide.

Fit a test tube with a delivery tube and place the delivery tube under a gas jar filled with water and placed on beehive shelve in a water tub. Heat the test tube containing Potassium Chlorate and Maganesedioxide. The oxygen produced in this reaction is passing through the delivery tube to the gas jar by the downward displacement of water.

Answer 5

Electrolysis of water will produce oxygen in the lab. It does need a trace of acid to help. Another common way is to heat a chlorate salt such as potassium chlorate.

2KClO3 ----> 2KCl + 3O2

Answer 6

Oxygen is not made - it is present naturally in the earths atmosphere. It is PRODUCED industrially by fractionation of liquid air

Answer 7

One of the laboratory prepare preparation of oxygen is by thermal dissociation of tetraoxochlorate V

Answer 8

Animals obtain oxygen by breathing.