Properties of Water: Penny Lab

Testing the effect of Acid on the ability of water to remain on a penny for Biology by Matt, Staci, Veronica, Melissa, and Michael

Baseline

Putting drops of wanter (pH 7) on a penny until surface tension breaks and the water spills of the penny.  Water is dropped onto the penny from a pipit suspended a few millimeters from the top of the water.

Matt	Plaz	Staci	Veronica	Melissa
31		34	42	25
29		35	45	38
35		31	34	42
32		42	40	50
31.75		35.5	40.25	38.75

Average of baseline averages: 36.56

Experiment

Replace water with a .25 molar sulfuric acid mixture with a pH of 2

Matt	Plaz	Staci	Veronica	Melissa
35	34	37	25	32
34		35	35	28
27		35	37	35
42		30	25	32
34.5		34.25	31.25	31.75

Average of baseline averages: 32.94

Results

3.62 drop decrease due to .25 molar sulfuric acid mixture with a pH of 2