Conservation of Mass



Materials Needed:

1)  triple beam balance 6)   10 ml graduated cylinder
2)  spoon 7)  balloon
3)  paper (scrap) 8)  vinegar
4)  baking soda 9)  250 ml Erlenmeyer flask
5)   safety glasses


Procedure:

1)  Put on safety glasses.
2)  Measure 10ml of vinegar in the graduated cylinder.  Be sure to look at the meniscus from eye level.
3)  Measure1 gram of baking soda.
4)  Measure the mass of the balloon.  Record it._____
5)  Measure the mass of the Erlenmeyer flask.  Record it._____
6)  Measure the mass of the 10ml graduated cylinder with the vinegar in it.  Record it._____
7)  Determine the total mass in grams:
a)  Mass of baking soda._____
b)  Mass of balloon._____
c)  Mass of Erlenmeyer flask._____
d)  Mass of 10ml cylinder and vinegar._____
e)  Total Mass_____
8)  Pour the baking soda into the Erlenmyer flask. 
9)  Get out your balloon.
10).  Add the venegar to the baking soda and quickly cover the top of the Erlenmeyer flask with the balloon.
11)  Determine the total mass in grams.  Mass of baking soda and vinegar mixture, Erlenmeyer flask, balloon, and 10ml     
        cylinder.
                                                   
12)  Compare the mass before ______  to the mass after ______.
13)  Subtract the highest from the lowest.  Show your work!

 

 

Mass that is unaccounted for _____.