Graphical Method for Calculating Density
Graphical Method for Calculating Density
I. Purpose
To graphically determine the density of two different substances. Class data will be used so as to include multiple trials.
II. Safety
Lab Safety Coats
-It will help prevent chemicals or etc. from getting on your clothes
Goggles
-It will help protect your eyes from anything getting into your eyes
III. Pre lab Questions
1. Calculate the slope of the line in the graph above. Use rise over run method. If you don’t know how, ask a friend or look it up. Clearly show your work for the calculation and include units in your answer.
Y2-Y1 3.15 grams - 2.10 grams 1.50 grams --------- = ------------ = -------- = 3 grams/mL X2-X1 1.5 mL -1 mL .5 mL
2. The slope of this line represents the _Density_ of the substance.
IV. Procedures
Get the samples of lead and brass. Also the samples must be clean and dry. Measure the mass of the empty beaker, and then add your lead carefully into your beaker carefully. Record your info. Use the displacement method to find the volume of the lead. Get a graduated cylinder, then fill it up half-full with sink water and record your info. Be very careful when adding your metal sample, try not splashing or losing anything out of the graduated cylinder. If you mess up, start over from step 2 with fresh samples. Also if the water does not cover the metal by now start all over with clean samples. Record your final volume. Repeat steps 2 and 3 for the other metals. Dry both samples.
V. Data and Observations
VI. Calculations
VII. Postlab Questions
1. What does this experiment demonstrate about the density of a substance?
This experiment showed us that we could use balances, the water displacement method, and a graduated cylinder to find the density of Iron and Aluminum. This doesn’t only work for Iron and Aluminum; it could work
I. Purpose
To graphically determine the density of two different substances. Class data will be used so as to include multiple trials.
II. Safety
Lab Safety Coats
-It will help prevent chemicals or etc. from getting on your clothes
Goggles
-It will help protect your eyes from anything getting into your eyes
III. Pre lab Questions
1. Calculate the slope of the line in the graph above. Use rise over run method. If you don’t know how, ask a friend or look it up. Clearly show your work for the calculation and include units in your answer.
Y2-Y1 3.15 grams - 2.10 grams 1.50 grams --------- = ------------ = -------- = 3 grams/mL X2-X1 1.5 mL -1 mL .5 mL
2. The slope of this line represents the _Density_ of the substance.
IV. Procedures
Get the samples of lead and brass. Also the samples must be clean and dry. Measure the mass of the empty beaker, and then add your lead carefully into your beaker carefully. Record your info. Use the displacement method to find the volume of the lead. Get a graduated cylinder, then fill it up half-full with sink water and record your info. Be very careful when adding your metal sample, try not splashing or losing anything out of the graduated cylinder. If you mess up, start over from step 2 with fresh samples. Also if the water does not cover the metal by now start all over with clean samples. Record your final volume. Repeat steps 2 and 3 for the other metals. Dry both samples.
V. Data and Observations
VI. Calculations
VII. Postlab Questions
1. What does this experiment demonstrate about the density of a substance?
This experiment showed us that we could use balances, the water displacement method, and a graduated cylinder to find the density of Iron and Aluminum. This doesn’t only work for Iron and Aluminum; it could work