MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Law of conservation of mass. Image 2 of 2. Beakers of silver nitrate (AgNO3) and sodium chloride (NaCl) solutions after mixing. The weight of the resulting mixture (left beaker) of solid silver chloride precipitate (AgCl, white) and sodium nitrate solution (NaNO3, clear) is the same as the combined weight before the reaction. The total mass is unchanged by the reaction. This is a chemical reaction that demonstrates the Law of Conservation of Mass. The Law of Conservation of Mass states that matter is not created or destroyed in chemical reactions, only rearranged. For an image showing the weight of the solutions before mixing see A500/0827.
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