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3.3: Exploring Density - Data and Report

Fundamentals of Chemistry (Lab manual) · LibreTexts

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    DATA AND OBSERVATIONS

    Name: _________________________Lab Partner(s): ______________________________

    Part A: Sink or Float.

    1. When water and cyclohexane were mixed, which liquid formed the top layer?​

     

     

    ​2. When water and amyl alcohol were mixed, which liquid formed the top layer?​

     

     

    ​

    Part B: Density of Water

    Part B: Table \(\PageIndex{1}\): Density of Water
     

    Trial 1

    Trial 2

    Trial 3

    Mass of Empty Graduated Cylinder

    		      

    Mass of Graduated Cylinder and Water

    		      

    Mass of Water

    		      

    Volume of Water

    		      

    Density of Water

    		      

    Show calculations for the density of water for each trial:

    Trial 1:
     

    Trial 2:
     

    Trial 3:
     

    Average density of water (show calculation):
     

    Percent error (show calculation):
     

    Part C: Density of an Unknown Liquid

    Unknown Liquid Number or Letter =

    Part C: Table \(\PageIndex{1}\): Density of an Unknown Liquid
     

    Trial 1

    Trial 2

    Trial 3

    Mass of Empty Graduated Cylinder

    		      

    Mass of Graduated Cylinder and Unknown

    		      

    Mass of Unknown

    		      

    Volume of Unknown

    		      

    Density of Unknown

    		      

    Show calculations for the density of the unknown liquid for each trial:

    Trial 1:
     

    Trial 2:
     

    Trial 3:
     

    Average density of unknown liquid (show calculations):
     

    Possible identity of unknown liquid (from table):
     

    Part D: Density of a Rectangular Block

    Unknown Rectangular Block Number or Letter:

    Color of Block:

    Mass of rectangular block =

    Length of rectangular block =

    Width of rectangular block =

    Height of rectangular block =

    Volume of rectangular block (show calculations): ​

     

     

     

    ​  

    Density of rectangular block (show calculations):​

     

     

     

    ​

    Part E: Density of a Rubber Stopper

    Part E: Table \(\PageIndex{1}\): Density of Rubber Stopper
     

    Trial 1

    Trial 2

    Mass of rubber stopper

    		    

    Initial volume of water

    		    

    Final volume of water

    		    

    Volume of rubber stopper

    		    

    Density of rubber stopper

    		    

    Show calculations for the density of the rubber stopper for each trial:

    Trial 1: ​

     

     

     

    ​  

    Trial 2: ​

     

     

     

    ​  

    Average density of rubber stopper (show calculations): ​

     

     

     

     

    POST LAB QUESTIONS

    1. When 2.0 mL of water and 2.0 mL of an unknown liquid were added to a 10-mL graduated cylinder, the water formed the top layer. Using the table of densities in part C of the experiment, propose an identity for the unknown liquid. ​

       

       

       

      ​
    2. List three potential sources of error for part B (density of water) and part C (density of unknown liquid) of this experiment. ​

       

       

       

    3. In addition to density, what other properties could have been used to support the identity of the unknown liquid? ​

       

       

       

      ​
    4. You are given a rectangular block that someone insists is gold. The block has a mass of 74.376 g and the following dimensions:

    length = 1.50 cm; width = 2.75 cm; height = 2.01 cm

    Part A: What is the density of the rectangular block? ​

     

     

     

     

    Part B: Based on the density, could the block be gold? If not, what could it be? (Note: You will need to search for the density of gold.) ​

     

     

     

     

    1. A rectangular sheet of aluminum foil, having a mass of 0.250 g, has a length of 5.75 cm and a width of 8.20 cm. If the density of aluminum is 2.70 g/cm3, find the aluminum foil's height (or thickness). ​

       

       

       

    Please click here to access the Pre-Lab, Data Tables, and Post-Lab in Word or PDF format. Complete them and upload according to your instructor's instructions. 

    3.3: Exploring Density - Data and Report is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.