Gold and Sand Density Lab
Background: As you saw in the film, Indiana Jones tried to steal the gold idol without triggering the booby trap -- and failed. He thought he could replace the gold idol on the pedestal with a bag of sand of equal volume. This plan didn’t work. Your job is to figure out why.
II. Prelab Questions:
- Obtain a sample of sand and record its mass.
- Measure the volume of the sand using a graduated cylinder.
- Record your results in the class data sheet.
- Plot the data in a graph, making sure mass is on the y axis and volume is on the x axis. You will need a title, axis titles (including units), a scale on each axis, data points, and a best fit line.
Mass of sand (g)
Volume of sand (mL)
V. Post Lab Questions:
- What is the slope of the line (density) obtained from the class data? Include units in your answer. Slope=(y2-y1)/(x2-x1,)
- The density of gold is 19.3 g/cm3. If the idol had a volume of 1500cm3, what was its mass in grams? 1mL=1cm3
- Indiana Jones needed to swap the idol with a bag of sand that had the same mass. What volume in milliliters of sand did he need to use (based on the density of sand you calculated)?
- The accepted value for the density of sand is 2.3 g/mL. What is the percent error for your experiment?
Percent Error = (Experimental Value - Actual Value) / Actual Value x 100