The thing about hydrofluoric acid and sodium hydroxide
In the past, there were school children who studied and smelled hydrofluoric acid, which is strong in nature and can erode glass, which is beyond the reach of other acids. He also knew that sodium hydroxide is also a strong substance and has alkali properties.

One day, the school child thought about what happened to the two. Then he tried to find his teacher, and the teacher said: "Hydrofluoric acid and sodium hydroxide, if they come into contact, will start to react. Hydrogen in hydrofluoric acid separates, and when it encounters hydroxide in sodium hydroxide, it converts into water. The rest, fluoride ions combine with sodium ions to form sodium fluoride."

The school child remembered it, saying: "Hydrofluoric acid and sodium hydroxide are combined, and water and sodium fluoride are formed. This is the reaction of neutralization." Therefore, the school child made another point in chemical science.