Question

what is law of conservation of mass? describe with an activity.​

Answer 1

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(a) DEFINATION

Mass can be neither be created not destroyed in a chemical reaction..

(b) ACTIVITY :

•Prepare 5% solution of each: Sodium sulphate and Barium chloride.

•A little amount of sodium sulphate solution is taken in a conical flask and a little solution of barium chloride is taken in an ignition tube.

•Hang the ignition tube in the conical flask carefully as shown in the figure.

•Put a cork on the flask and weigh the flask with its contents.

•Now, tilt and swirl the flask so that the two solutions mixed-up well.

•Weigh the flask again.

(c) Observation :

•Chemical reaction takes place.

•Weight of the flask remains same before and after the reaction.

(d)Conclusion :

• Total mass of the products = Total mass of the reactants.

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Answer 2

LAW OF CONSERVATION OF MASS :-

⭐ It states that mass is an isolated system is neither created nor be destroyed by chemical reaction or physically ..

⭐ MASS OF PRODUCT = MASS OF REACTANT.

⭐ EXAMPLE

Take a candle ,

now , if you massed the oxygen and wax ..

It would be equal to the mass of products and reactants.