Conservation of Mass

Conservation of Mass
Demonstration Using Potassium Iodide and Lead Nitrate

In a chemical reaction, matter cannot be created or destroyed. The total mass of the reactants will always equal the total mass of the products in a closed system.

A simple demonstration of this concept. Reactants and products are weighed.

Lead Nitrate + Potassium Iodide --> Potassium Nitrate + Lead Iodide
Pb(NO3)2 (aq) + 2KI (aq) --> 2KNO3 (aq) + PbI2 (s)