Title: (2.12) Mass of Mixed Solutions

    Purpose: To determine if mass change when tow solutions are mixed.

Hypothesis: If…then…, because…

Materials: (2) Vials Solution A Solution B (2) Pipettes

   

Procedure: 1. With a pipette fill vial A with solution A DONE! 2. With a pipette fill vial B with solution B DONE! 3. Make and record THREE observations of solutions A and B 4. Place both vials containing solution A and B on the balance. 5. Record the mass. 6. Pour solution A into Solution B 7. Make and record the observations of Solution A + Solution B 8. Place vial B with the solution and empty vial A on the balance. DO NOT SPILL ANYTHING!!! 9. Record the mass. 10. Clean up.

Data Table

Mass of system before mixing _____g

Mass of system after mixing _____g

Change in Mass _____g

Qualitative Data/Observations1.2.3.

A Hour Data

# Delta mass(g)1 0.00 2 0.00 3 +0.094 -.0010 5 -0.246 -.077 .248 0.009 -.68

B Hour Data # Delta mass(g)1 +0.05 2 -0.01 3 -0.014 -0.02 5 -0.016 +0.007 -0.018 +0.009 -0.01

Research Question Did the mass change as a result of mixing? Why do you think this is the case?

Conclusion