law of conservation of mass
The Law of Conservation of Mass was established in 1789 by french chemist Antoine Lavoisier. It states that mass is neither created nor destroyed in a chemical reaction, or in other words; the mass of substances produced (products) by a chemical reaction is always equal to the mass of the reacting substances (reactants).
Examples:
- SiI4 + 2Mg → Si + 2MgI2
- 3NH4Cl + AlPO4 → (NH4)3PO4 + AlCl3
- 3(NH4)2O + 2Cr(BrO3)3 → Cr2O3 + 6NH4BrO3
- K3PO4 + 3HCl → 3KCl + H3PO4
- 2Na + 2HNO3 → 2NaNO3 + H2