Question

State the law of conversion of mass.

Answer 1

Law of conservation of mass: It states that mass can neither be created nor destroyed in a chemical
reaction. During any change (physical or chemical), matter is neither created nor destroyed. However it
may change from one form to another.
Experimental Veri cation of Law of Conservation of Mass
Requirements: H-shaped tube called Landolt’s tube, Sodium chloride solution, silver nitrate solution,
etc.
Procedure: A specially designed H-shaped tube is taken. Sodium chloride solution is taken in one limb
of the tube and silver nitrate solution in the other limb as shown in gure.
Both the limbs are now sealed and weighed. Now the tubes is averted so that the solutions can mix up together and react chemically. The reaction takes place and a white precipitate of silver chloride is obtained.
The tube is weighed again. The mass of the tube is found to be exactly the same as the mass obtained before inverting the tube. Thus, this experiment clearly veri es the law of conservation of mass.