Laboratory Techniques and Measurements

Purpose

The purpose of this experiment is to determine mass, length, temperature, volume, and density of objects and liquids using common measuring devices and algebraic formulas. The metric system, the most common set of measurements used in science, which includes meters, liters, Celsius, and grams will be used.

Procedure

The following items were used within the experiment:

(1) Metric ruler with centimeter (cm) and millimeter (mm), (1) table salt, (1) small number of ice cubes, (1) piece of string, (1) isopropyl (rubbing) alcohol, (1) tap water, (1) distilled water, 25 mL, (1) paper, 5 cm x 5 cm for weighing chemicals, (1) colored drink, (1) beaker, 100 mL, glass (1) burner-fuel, (1) burner-stand, (1) cylinder, 25 mL, (1) 23-mL volumetric flask, (1) Pipet, Serological 2mL, (1) Bulb, Rubber (1) Goggles-Saftey, (1) Scale-Digital-500g, (1) Test Tube (1), 13 x 100 mm, (1) Thermometer, (1) Bolt, (1) Magnet bar, (1) Pipet, Empty Short Stem

The following steps were taken:

Prior to commencing the experiment all scientific measurements were reviewed, along with formulas to convert linear Systeme Internationale (S) with other comparable units. The following was reviewed:

Length:

1 in = 2.54 cm 1000 m = 1 km

1 km = 0.621 mi 1 m = 100 cm

1 m = 1.09 yd 1 m = 1000 mm

1 m = 3.281 ft 1 cm = 10 mm

Temperature:

Clesius (C) ; Kelvin (K); Fahrenheit (F); Temperature (T)

TK= T,C + 273 TF = (1.8) T,C + 32 T,C= (T,C – 32) 1.8

Volume:

1 L = 1000 mL = 1000 cm3

1 mL = 1 cm3 1 L = 1.06 qt

Mass:

1 kg = 1000 g 1 lb = 454 g 1 g = 1000 mg 1 kg= 2.20 lb

Time:

Seconds (s)

Density:

Liquids g/mL solids g/cc or g/cm3

Dilution of Aqueous Solutions:

Mi = initial molarity of the solution (before dilution)

Vi = initial volume of the solution (before dilution)

Mf = final molarity of the solution (after dilution)

Vf = final volume of solution (after dilution)

There were six different