Laboratory Techniques and Measurements

Purpose of Experiment:

The purpose of this experiment will be to gain an understanding of the universal used system of measurements, known as the “International System of Units” or SI within a lab experiment. This system will then be used to measure temperatures, density and observe the nature of dilutions while using the M1 x V1 = M2 x V2 equation. The Archimedes Principle will be the standard for this experiment.

Procedure:

Read and understand the standard system of measurement known as the SI system. This will be done through the testing of different items to determine volume, mass, length, temperature and then using these measurements to properly calculate density and concentration.

Data Table 1: Length measurements.

Object Length (cm) Length (mm) Length (m)

CD or DVD 11.9 119 0.119

Key 5.2 52 0.052

Spoon 15.2 152 0.152

Fork 18.1 181 0.181

Data Table 2: Temperature measurements.

Water Temperature (°C) Temperature (°F) Temperature (K)

Hot from tap 42 107.6 315.15

Boiling 100 212 373.15

Boiling for 5 minutes 100 212 373.15

Cold from tap 19 66.2 292.15

Ice water – 1 minute 10 50 283.15

Ice water – 5 minutes 8 46.4 281.15

Data Table 3: Mass measurements.

Object Estimated Mass (g) Actual Mass (g) Actual Mass (kg)

Pen or pencil 5.4 8.9 .0089

3 Pennies 6 7.5 .0075

1 Quarter 8 5.6 .0056

2 Quarters, 3 Dimes 16.2 18.1 .0181

4 Dimes, 5 Pennies 14.8 21.6 .0216

3 Quarters, 1 Dime, 5 Pennies 29 31.7 .0317

Key 7 7.4 .0074

Key, 1 Quarter, 4 Pennies 23 23 .0230

Data Table 4: Liquid measurements.

Mass A Mass B Mass B - A

Liquid

Volume

(mL)

Graduated

Cylinder (g) Graduated

Cylinder

with liquid (g)

Liquid (g) Density

g/mL

% Error

Water 5 16.8 21.8 5 1 0

Isopropyl alcohol 5 16.8 21.2 4.4 .88 11.96

Data Table 5: Magnet – Measurement Method.

Object: Mass

(g) Length

(cm) Width

(cm) Height

(cm) Volume

(cm3) Density

(g/cm3)

Magnet 4 2.5 0.5 0.5 0.625 6.4

Data Table 6: Displacement...