Laboratory Techniques
Title: Laboratory Techniques and Measurements
Purpose: To properly use, understand, and correctly convert the scientific measurements such as: finding density, converting centimeters to millimeters, 3 different units of temperature, etc…
Procedure: I used a metric ruler to measure the length of the objects, a thermometer to determine the degrees of the water, and a scale to determine the mass of the designated objects. I used the proper equipment to measure out or hold the item. After I gathered all the needed information, I substituted the information into different formulas to get the other needed information.
Data Tables:
Data Table 1: Length measurements.
Object
Length (cm)
Length (mm)
Length (m)
CD or DVD
12 cm
120 mm
.12 m
Key
5.2 cm
52 mm
.052 m
Spoon
14.5 cm
145 mm
.145 m
Fork
16 cm
160 cm
.16 m
Data Table 2: Temperature measurements.
Water
Temperature (°C)
Temperature (°F)
Temperature (K)
Hot from tap
53 C
127.4 F
326.15 K
Boiling
99 C
210.20 F
372.15 K
Boiling for 5 minutes
101 C
213.8 F
374.15 K
Cold from tap
25 C
77 F
298.15 K
Ice water – 1 minute
10 C
50 F
283.15 K
Ice water – 5 minutes
5 C
41 F 278.15 K
Data Table 3: Mass measurements.
Object
Estimated Mass (g)
Actual Mass (g)
Actual Mass (kg)
Pen or pencil
2 g
7.2 g
0.0072 kg
3 Pennies
4 g
7.6 g
0.0076 kg
1 Quarter
3 g
5.8 g
0.0058 kg
2 Quarters, 3 Dimes
5.6 g
19 g
0.019 kg
4 Dimes, 5 Pennies
7 g
21.5 g
0.0215 kg
3 Quarters, 1 Dime, 5 Pennies
10 g
31.9 g
0.0319 kg
Key
5 g
7.3 g
0.0073 kg
Key, 1 Quarter, 4 Pennies
8 g
23.1 g
0.0231 kg
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 mL
17.1 g
22 g
4.9 g
0.98
-2
Isopropyl alcohol
5 mL
17.1 g
21.2 g
4.1
0.82
4.33
Data Table 5: Magnet – Measurement Method.
Object:
Mass
(g)
Purpose: To properly use, understand, and correctly convert the scientific measurements such as: finding density, converting centimeters to millimeters, 3 different units of temperature, etc…
Procedure: I used a metric ruler to measure the length of the objects, a thermometer to determine the degrees of the water, and a scale to determine the mass of the designated objects. I used the proper equipment to measure out or hold the item. After I gathered all the needed information, I substituted the information into different formulas to get the other needed information.
Data Tables:
Data Table 1: Length measurements.
Object
Length (cm)
Length (mm)
Length (m)
CD or DVD
12 cm
120 mm
.12 m
Key
5.2 cm
52 mm
.052 m
Spoon
14.5 cm
145 mm
.145 m
Fork
16 cm
160 cm
.16 m
Data Table 2: Temperature measurements.
Water
Temperature (°C)
Temperature (°F)
Temperature (K)
Hot from tap
53 C
127.4 F
326.15 K
Boiling
99 C
210.20 F
372.15 K
Boiling for 5 minutes
101 C
213.8 F
374.15 K
Cold from tap
25 C
77 F
298.15 K
Ice water – 1 minute
10 C
50 F
283.15 K
Ice water – 5 minutes
5 C
41 F 278.15 K
Data Table 3: Mass measurements.
Object
Estimated Mass (g)
Actual Mass (g)
Actual Mass (kg)
Pen or pencil
2 g
7.2 g
0.0072 kg
3 Pennies
4 g
7.6 g
0.0076 kg
1 Quarter
3 g
5.8 g
0.0058 kg
2 Quarters, 3 Dimes
5.6 g
19 g
0.019 kg
4 Dimes, 5 Pennies
7 g
21.5 g
0.0215 kg
3 Quarters, 1 Dime, 5 Pennies
10 g
31.9 g
0.0319 kg
Key
5 g
7.3 g
0.0073 kg
Key, 1 Quarter, 4 Pennies
8 g
23.1 g
0.0231 kg
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 mL
17.1 g
22 g
4.9 g
0.98
-2
Isopropyl alcohol
5 mL
17.1 g
21.2 g
4.1
0.82
4.33
Data Table 5: Magnet – Measurement Method.
Object:
Mass
(g)