Mystery Liquid Lab 2009
0 1 2 3 4 5 6 7 80.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Density of Unknown Liquid
Glassware
De
ns
ity
(g
/mL
)
Mystery Liquid Lab 2009Glassware Used
Average Density (g/mL)
% Error Standard Deviation
1 10-mL grad cyl 0.9594 -3.77 0.0247
2 50-mL beaker 0.9385 -5.86 0.0391
3 100-mL beaker 0.8180 -17.95 0.1147
4 1000-mL grad cyl 0.8699 -12.75 0.0496
5 2000-mL beaker 1.1093 11.26 0.4117
6 50-mL Erlenmeyer Flask 0.9718 -2.53 0.0721
7 100-mL grad cyl 0.9632 -3.39 0.0338
Mystery Liquid Lab 2006-2009
0 1 2 3 4 5 6 7 80.4
0.6
0.8
1
1.2
1.4
1.6
1.8
Density of Unknown Liquid 2006-2009
Glassware
De
ns
ity
(g
/mL
)
Mystery Liquid Lab 2006-2009Glassware Used
Average Density (g/mL)
% Error Standard Deviation
1 10-mL grad cyl 0.9674 -2.97 0.0123
2 50-mL beaker 0.9088 -8.84 0.0266
3 100-mL beaker 0.8596 -13.78 0.0736
4 1000-mL grad cyl 0.9079 -8.94 0.0394
5 2000-mL beaker 1.0139 1.69 0.1102
6 50-mL Erlenmeyer Flask 0.9527 -4.44 0.1419
7 100-mL grad cyl 0.9783 -1.87 0.0536
Dihydrogen Monoxide
• Each year, DHMO is a known causative component in many thousands of deaths and is a major contributor to millions upon millions of dollars in damage to property and the environment. Some of the known perils of DHMO are:
Dangers of DHMO• Death due to accidental inhalation
of DHMO, even in small quantities. • Prolonged exposure to solid DHMO
causes severe tissue damage. • Excessive ingestion produces a
number of unpleasant though not typically life-threatening side-effects.
• DHMO is a major component of acid rain.
• Gaseous DHMO can cause severe burns.
• Contributes to soil erosion.
• Leads to corrosion and oxidation of many metals.
• Contamination of electrical systems often causes short-circuits.
• Exposure decreases effectiveness of automobile brakes.
• Found in biopsies of pre-cancerous tumors and lesions.
• Often associated with killer cyclones in the U.S. Midwest and elsewhere.
• Thermal variations in DHMO are a suspected contributor to the El Nino weather effect.
What is DHMO?