If you want to get a bottle of dry oxygen, if you want to get dry oxygen, what can you use to collec

No, because after passing the sodium hydroxide, water will become an impurity. It should first pass through sodium hydroxide, remove carbon dioxide, and then through concentrated sulfuric acid, go out of the water, and then it's OK.

What is the water absorption of sodium hydroxide? Who told you that? Sodium hydroxide is basically not absorbent.

Concentrated sulfuric acid has no water vapor, concentrated sulfuric acid itself has water absorption, it can separate the water in the substance, and the water absorption is quite strong. (If you don't believe it, you can try it for yourself).

Sodium hydroxide solution is not absorbent! How can it be possible to absorb water when it is all aqueous solution, and the concentrated sulfuric acid is 98%!

The gas passes through the sodium hydroxide solution and brings out the water vapor.

First, sodium peroxide reacts with carbon dioxide to produce sodium carbonate and oxygen.

Then the resulting gas is a mixture of carbon dioxide and oxygen (without water) which is needed to remove carbon dioxide. What is obtained is oxygen and a small amount of water vapor. In order to remove water vapor, concentrated sulfuric acid is used.

In secondary school chemistry, concentrated sulphuric acid can remove almost all gases except ammonia (with soda lime).

NaOH solution has water vapor and does not dry out oxygen.

Concentrated sulfuric acid is absorbent and can dry most acidic neutral gases.

Sodium peroxide and carbon dioxide produce sodium carbonate and oxygen. Then pass a sufficient amount of calcium hydroxide solution. There is a surplus of carbon dioxide (perhaps). ）

Through a washing bottle containing concentrated sulfuric acid, it does not react with carbon dioxide.

Method: Tea village fixed-point interest collection (check and fixed-point collection and extinguishing).

Check]: Check the air tightness of the device (hold the test tube with your hand, or wrap it in a hot towel, and insert the catheter into the water, if there are bubbles coming out, the air tightness is good).

Installation]: Combination device.

Fixed]: The test tube should be tilted (to prevent the condensate from backflowing and bursting is the bottom of the tube) [point]: Light the alcohol lamp and preheat it back and forth at the bottom of the test tube.

Receiving]: Take back the alcohol lamp, not directly retract, you should leave the test tube first.

、、And some I'm not happy to send it.。。。 If you're happy, go find the chemistry book on the Sujiao version of the nine, it's not necessarily right... I didn't find the hair on the tree, and based on my impression, it seems to be wrong.

If it is a laboratory oxygen, because the density of oxygen is greater than the density of air, you can use the upward air exhaust method (the catheter is extended into the bottom of the gas collection cylinder and filled with a Martian wooden strip), and if you want to use the drainage method, you can concentrate sulfuric acid.

Because the relative molecular mass of oxygen is 32 is greater than the average relative molecular mass of air (29), the density is greater than that of air, and the upward air exhaust method can be used.

1.The upward exhaust method can be used.

2.Drainage methods are available.

At the end of the collection, the gas is passed into the concentrated sulfuric acid, and after passing through, the dry oxygen is collected.