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ICSE Class 8 Answered

Describe the experiment which proves the law of conservation of mass
Asked by gurkamlsingh13 | 21 May, 2023, 11:54: AM
answered-by-expert Expert Answer
Dear Student,
 

Law of conservation of mass states that, “the mass can neither be created nor destroyed but is transformed from one form to another.”

 
 

Experiment steps to demonstrate the law of conservation of mass:

Step A:  A test tube filled with BaCl2 solution was placed inside a flask containing CuSO4 solution and corked. Before mixing the contents of the test tube and the flask, the entire equipment was weighed and the weight was recorded.

Step B:  The contents of the flask and the test tube were mixed.

Step C:  After mixing the contents, the weight of the entire equipment was noted down again.

Observations:

After mixing, CuSO4 and BaCl2 react with one another to form CuCl2 and a white residue of BaSO4.

Conclusion of experimental demonstration of the law of conservation of mass:

Total weight before and after the experiment is same. This proves that the mass can neither be created nor destroyed. It simply gets transformed from one form to another.

Answered by | 22 May, 2023, 09:31: AM

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