Volume of liquids on a Penny Honors Chemistry

 

background [prelab assignment (10 points); due at the beginning of lab]

design / describe an experimental protocol based on the below materials (& incomplete methods) to determine the maximum volume (in mL) of a liquid on a penny

sketch a data table for your experimental measurements

purpose

using conversion factors, determine the maximum volume (in mL) of water versus isopropanol on a penny (heads side)

compare the maximum volume of liquid on a penny

materials

water; isopropanol; penny

dropper bottle; graduated cylinder; balance

methods, data, & analysis

student design; determine the mass of 15 drops of the liquid - to use as a conversion factor

 

Content of lab report   (20 points)

data analysis (10 points)

data table of your experimental data

determine the volume of liquid on the penny using conversion factors (show your work)

discussion (10 points)

statistics (include interpretation of p-value)

using concepts of intermolecular force & the chemical structure of water & alcohol, rationalize the relative volumes of the 2 liquids on a coin 

 

resources

lab activity source (examples):  site 1  &  site 2  [access 4 / 2009]