Question

How do you conduct a lab activity to observe the change in the mass before and after a chemical reaction?​

Answer 1

LAW OF CONSERVATION MASS

Explanation:

things required:

cork

thread

conical flask

small ignition tube

solution x

solution y

method :

1)we need to fill the solution x in the ignition tube and solution y in conical flask

2) then tie a thread to ignition tube and hang it in the conical flask

3)lock the opening of the conical flask with a cork

4)check the mass of the entire setup.

5)now let the both solutions to mix up but don't remove the cork(because the gas that is released due to reaction shouldn't escape)

6)now check the mass of the entire set up

vision:

finally we will get to know that the mass before and after the reaction is the same.

hope this will help you

Answer 2

According to the law of conservation of mass, the total mass of the reactants and products before and after the chemical reaction remains the same.

• First you need to put two plastic pipettes containing the solutions of chemicals x and y in the outer two wells of the mini well-plate.
• Now, place them on a balance and record their mass.
• Put solution x into the middle well followed by solution y.
• Record any changes observed and write the necessary equations for the reaction.
• Reweigh the apparatus as a whole and record its mass to see if there is any change in the mass.