Density Column

  • Density Column Lab

    2. Record your observations - include a drawing!



    Problem:  Will a rubber duck with a density of .4 g/cm3 float on water?


    Hypothesis:  ____________________________________________________________________________________


    Materials:       4 plastic cups (3 marked with a 20ml line)

                            1 small and 1 large Glass beaker

                            1 drop food coloring – red

                            30 ml water               20 ml corn oil

                            20 ml corn syrup      20 ml glycerin

                            Solid object – (record mass ____ and volume _____ = _________ g/cm3)


    Procedure:     1. Measure out 30 ml of water and add 1 drop of food coloring with               small beaker.

                            2.  Empty the colored water into the large beaker.

                            3. Separately measure out 20 ml of the three remaining liquids.

                            4. Empty each into the large beaker  - one at a time.

                            5. Wait for liquids to settle and note observations.

    6. Drop your solid object into the beaker and record your   observations.

    Observations:   Draw beaker and describe ALL observartions – before, after and

                            during  “test.”




    3. COPY AND Complete ALL QUESTIONS  below. 

    Density Column Lab


    Object:     Rubber Duck .4g/cm3           


    Densities for Liquids

    Rubbing alcohol (blue)

    0.87 g in 1 mL

    Water (green)

    1.00 g in 1 mL

    Vegetable oil (yellow)

    0.91 g in 1 mL

    Glycerin (clear)

    1.26 g in 1 mL

    Dawn dish washing liquid

    1.03 g in 1 mL


    1. Which liquid must you place first in the column so that none of the liquids will mix with each other? Explain your reasoning.





    Determine the density of your object by dropping it into the column and answering the following questions:


    1. What is the liquid just above the object?




    1. What is the liquid just below the object?




    1. What must be the range of the object’s density?



    The density must be between: ­­­­             and              g in 1 mL.


    1. Explain how you knew to estimate the density of the object.





    1. How much mass is there in 10 mL of water? Explain or show your math.





    1. How much volume does 2.06 g of Dawn dish washing liquid take up? Explain or show your math.