Lead acetate and hydrochloric acid
At some point, there is lead acetate (Lead II Acetate) placed in one place, and hydrochloric acid (Hydrochloric Acid) is also on the side. When the two meet, their transformation occurs.

Lead acetate has a stable nature, but when it encounters hydrochloric acid, it is a formidable enemy. Hydrochloric acid is lively, strong and active, and its ions are active, eager to combine with others. Lead ions in lead acetate and chloride ions in hydrochloric acid attract each other and want to form new substances.

Therefore, the reaction starts suddenly, and in the solution, the particles intersect. Lead ions and chloride ions embrace each other and gradually converge to form lead chloride (Lead Chloride), which is a white precipitate that slowly sinks at the bottom of the vessel, like frost and snow falling in the abyss. Acetate ions and hydrogen ions are combined to form acetic acid (Acetic Acid), which is scattered between solutions.

Looking at this change, it can be seen that substances meet and change due to nature. Lead acetate and hydrochloric acid are two substances. Once mixed, their quality and shape are different from before. This is the wonder of the combination of substances, and the strangeness of the change. Although there is no thunder and fire, the microscopic world and the movement of particles are also wonderful and breathtaking.