DENJIRO: Lately, you might have seen or heard the term “hypochlorous acid.” It is often used in disinfectants. So what sort of properties does hypochlorous acid have? First, let’s try making hypochlorous acid.
In this syringe, there is hydrochloric acid. In the test tube here, there is calcium hypochlorite. I’m going to inject the hydrochloric acid into the test tube.
The hydrochloric acid and calcium hypochlorite react to each other, making chlorine. The chlorine is stored in this plastic bottle containing water. I’m going to close the bottle. When I shake it...
BOY: The bottle got crushed!
DENJIRO: The bottle is now crushed. The water and chlorine reacted with each other, making hypochlorous acid and hydrogen chloride. The two substances dissolve easily in water, so the bottle got crushed since the gaseous chlorine is gone. Now, has hypochlorous acid really been produced? Let’s check. Right now, it’s too concentrated, so I’m going to transfer some to a beaker full of water to dilute it. Let me use this test strip that tests the concentration of hypochlorous acid.
It immediately turned brown. We can see that this solution does indeed contain hypochlorous acid. Now, I’m going to mix the hypochlorous acid in colored water.
BOY: The water all turned transparent!
DENJIRO: Hypochlorous acid dissolves easily in water and also has bleaching properties.
NARRATOR: Hypochlorous acid is also used to disinfect pools and tap water.
DENJIRO: I hope energy will bring you all happiness. Our magic word is "Happy Energy!"
5 сен 2024
