The law of conservation of mass

The law of conservation of mass
The law of conservation of mass


The law of conservation of mass can be explained using a simple exothermic reaction with copper and sulphur. The test tube is hermetically sealed to prevent any exchange of substances with the environment. The students realise that despite the change in the substance, the mass of the system remains constant. Furthermore, the mass defect can be discussed.

Components of equipment sets

1 6045682  4 
Powder spatula, steel, 185 mm LD
1 667057  4 
Test tube rack metal, 20 mm Ø LD
1 667031  4 
Test tube holder 20 mm Ø LD
1 6640421  4 
Test tube Fiolax 16 mm x 160 mm LD
1 610010  8 
Laboratory safety goggles LD
1 6667031  8 
Teclu burner, propane LD
1 ADACB501  4 
Compact scale 500 g : 0.1 g LD
1 6728800  4 
Copper, powder, 50 g LD
GHS09 Warning H400
1 6747610  4 
Sulfur, sublimed, 500 g LD
GHS07 Warning H315
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