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?