MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
The Law of Conservation of Mass. Beakers of silver nitrate (AgNO3) and sodium chloride (NaCl) solutions before mixing (left) and after mixing (right). 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. 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. See A500/0827 and A500/0828 for the individual images.
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