Question

explain the process and precautions in verifying law of conservation of mass​

Answer 1

Answer:

mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants known as the law of conservation of mass

Answer 2

Procedure:

1. Take sodium sulphate solution into a beaker.

2. Pour 4ml sodium sulphate solution into a measuring cylinder.

3. Transfer it into a conical flask.

4. Take barium chloride solution into a beaker.

5. Pour 4ml barium chloride solution into a measuring cylinder.

6. Transfer it into a test tube.

7. Take a thread.

8. Tie the test tube using the thread.

9. Hang the test tube in the conical flask carefully, without mixing

the solutions.

10. Close the flask with a cork.

11. Weigh the flask with its content carefully using electric balance.

12. Now tilt and swirl the flask, so that the two solutions mix.

13. Weigh the flask again using the same electric balance.

Observations:

Weight of flask and contents before mixing= m1g

Weight of flask and contents after mixing =m2g

Conclusion:

We observed that the two weights i.e.m1 and m2 are equal. This

proves the law of conservation of mass.

Precautions:

1. Care should be taken while handling the chemicals.

2. Contents of the conical flask should not mix before weighing first

time.

3. Tie a thick thread to the conical flask, so that it will not slip while weighing