Why can t I have a rubber stopper when storing liquid bromine?

Both natural rubber and synthetic rubber have carbon-carbon double bonds, which are easy to have an addition reaction with liquid bromine to corrode the rubber, so you can't use rubber plugs to stop Ha Thank you Follow-up question: Sorry, I just raised one, what is the addition reaction? Can you be a little more specific?

I'm sorry. It's offline.

Only now do I see it. Since it is only one elevated. You can understand that liquid bromine is corrosive to rubber.

As for the addition reaction. Sophomores in high school. Now that you've talked about it, you may not be able to understand it.

I won't go into details. Thank you.

Liquid bromine is a strong oxidizing agent, and rubber contains unsaturated bonds, which makes it easy to oxidize with the unsaturated bonds in rubber, resulting in the breaking of the long carbon chain of the molecule in the rubber, resulting in corrosion.

In addition, liquid bromine is volatile, and liquid bromine is stored in a fine-mouth bottle, sealed with a glass bottle after being sealed with water.

Polyisoprene and polybutadiene are commonly used in rubber, both of which contain carbon-carbon double bonds, with which liquid bromine can have an addition reaction that further causes other changes, in this sense, due to the corrosive nature of liquid bromine.

Liquid bromine is not acidic. According to the definition of high school chemistry, acidity is mainly caused by ionized hydrogen ions. There is no hydrogen in liquid bromine, so it is not acidic, and bromine water is weakly acidic.

And acidity is not a sufficient condition to cause corrosion, after all, hydrochloric acid also uses rubber stoppers.

Hello! The secondary reason is that liquid bromine is acidic, which will oxidize rubber, and it is a non-polar solvent, and the main reason for completing rubber aging is that liquid bromine has strong oxidizing properties.

When in doubt, please ask.

Answer: Bromine vapor will corrode rubber Iodine is easy to sublimate, iodine vapor is in contact with the iron shed and the lid of the iron shed, which is easy to react, so that the iron is corroded A small amount of chlorine molecules contained in tap water can react with KI Analysis stool: Because bromine is corrosive, no rubber stopper is used Iodine reacts with iron without iron containers A small amount of chlorine molecules contained in tap water can react with KI, so it is not possible to use tap water to prepare potassium iodide dissolving solution

Answer: The main component of rubber stopper is polyisoprene, which will have an addition reaction with bromine, which will cause the rubber to deteriorate. Therefore, the glass bottle for the storage of liquid bromine should not be plugged with rubber mountain books, but should be corked with glass. [Test questions are divided into comics].

Mainly because liquid bromine has strong oxidizing properties, it will oxidize rubber and complete rubber aging. The secondary reason is that liquid bromine is acidic and is a non-polar solvent that dissolves rubber.