law of conservation of mass matter cannot be created nor destroyed during a physical or chemical...
TRANSCRIPT
Conservation of Mass
Post Lab Discussion
Law of Conservation of Mass
Matter cannot be created nor destroyed during a physical or chemical change.
The sum of the reactants will equal the sum of the products after a physical or chemical change.
Reactants Products: Matter is conserved.
Antoine Lavosier
Aluminum and Copper Chloride
2Al + 3CuCl2 3Cu + 2AlCl3
Two Aluminum Two Aluminum
Three Copper Three Copper
Six Chlorine Six Chlorine
Reactants EQUAL Products
Copper Chloride and Sodium Hydrogen Phosphate
3CuCl2 + 2Na3PO4 ---> Cu3(PO4)2 + 6NaCl
3 Copper 3 Copper
6 Chlorine 6 Chlorine
6 Sodium 6 Sodium
2 Phosphorus 2 Phosphorus
8 Oxygen 8 Oxygen
Chemical vs. Physical
Chemical Change: reactants mix together to form a new product with different properties
Gas is formed Rust is formed Precipitate (solid) formed
Physical Change: reactants mix together but product maintains the same properties as the reactants.
Melting Freezing Dissolving
Chemical vs. Physical Which experiments demonstrated a chemical
change?
Which experiments demonstrated a physical change?