The law of conservation of mass is a law that states that mass can neither be destroyed or created. So you cannot create mass or destroy it. The law was discovered by Antoine Laurent Lavoisier in about 1789. The mass of an element at the beginning of a reaction will be equivalent to the mass at the end of the reaction. So what, technically, is mass? Well, according to the dictionary definition, it is a coherent, typically large body of matter with no definite shape. One simple demonstration for this law is the reaction between lead acetate and potassium chromate. This demonstration is used by most teachers, when they need to demonstrate the law of conservation of mass. Some teachers don’t use this demonstration, and either use a different substance or decomposing sugar or ammonium dichromate in an evacuated flask. They rather prefer the decomposition because of the simple preparation and it’s more safe. So most teachers, when demonstrating law of conservation of mass, decide to go with the chemical reactions of lead acetate and potassium chromate. But those teachers who decide to go with the easier, more simple preparation go with the decomposition of sugar or ammonium dichromate.…show more content… He was the one the founded it, right? Yes, he was. And his demonstration was weighing a piece of paper in a closed container before burning it. And weighing it after, and the weight being the same, he was able to show that the mass would stay the same in a chemical or physical reaction. As mentioned in an earlier paragraph, lead acetate and potassium chromate have the same mass before and after a chemical reaction. That’s why most teachers decide to go with that reaction, because it’s most demonstrative. The other demonstration is a more simple preparation and safer, that’s why some teachers go with that
