Fluorosilicic acid

Fluorosilicic acid is a liquid made up of tiny little pieces called molecules, and it's used to help keep your teeth strong and healthy. But don't worry, it's not something you drink like juice or soda. Instead, it's mixed with water and then added to something called a water treatment plant. This means that the water you use to brush your teeth or take a bath in has a little bit of the fluorosilicic acid in it.

So why do we want to add this stuff to our water? Well, the fluorosilicic acid has a special ingredient called fluoride that's really good at keeping your teeth from getting cavities (holes). When you brush your teeth with toothpaste, you might notice that it has fluoride in it too. That's because fluoride helps to protect your teeth from getting hurt by the bad germs that can grow in your mouth if you don't clean your teeth well.

Adding a little bit of fluorosilicic acid to the water is one way that we can make sure that everyone in the city or town gets enough fluoride to help keep their teeth healthy. It's sort of like how we add salt to food to make it taste better, but instead of making it taste better, we're making it better for our teeth.

So, in summary, fluorosilicic acid is a liquid that's mixed with water to help keep our teeth healthy and strong.