Density, Accuracy, Precision And Graphing
Experiment
Density, Accuracy, Precision And Graphing
OBJECTIVES
1. The determination of the density of water
2. A comparison of the accuracy and precision of a graduated cylinder and a pipet
EXPERIMENTAL MATERIALS
Part A
A 50mL graduated cylinder
A balance
50.0mL deionized water
A rubber policeman
Part B
A 100mL beaker
A 50mL graduated cylinder
A volumetric pipet
120.0mL deionized water
A thermometer
A rubber policeman
EXPERIMENTAL METHODS
Part A: Density of water
1. An empty, dry 50mL graduated cylinder was obtained.
2. The mass of graduated cylinder with using a balance.
3. 10.0mL of deionized water was added to the 50mL graduated cylinder.
4. Mass of 10.0mL of deionized water + the cylinder was measured with balance.
5. To take only mass value of the 10.0mL deionized water, the mass value of the graduated cylinder was subtracted from the mass value of the 10.0mL of deionized water + the cylinder.
6. Density of 10.0mL of deionized water was calculated by its’ mass and volume. (d=m/v)
7. The exact density of the 10.0mL of deionized water was recorded on the data sheet.
8. Deionized water was added up to the 30.0mL mark of the 50mL graduated cylinder and Steps 3 to 7 were repeated for 30.0mL.
9. Deionized water was added up to the 50.0mL mark of the 50mL graduated cylinder and Steps 3 to 7 were repeated for 50.0mL.
Part B: Accuracy and Precision
Using a graduated cylinder
1. An empty, dry 100mL beaker was obtained and measured its’ mass with a balance.
2. 10.0mL of deionized water was added to a graduated cylinder and transferred it to the 100mL beaker.
3. Mass of 10.0mL of deionized water + the beaker was measured.
4. To take only the mass value of the 10.0mL deionized water, the mass value of the beaker was subtracted from the mass value of the 10.0mL deionized water + the beaker.
5. Density of 10.0mL of deionized water was calculated by
Density, Accuracy, Precision And Graphing
OBJECTIVES
1. The determination of the density of water
2. A comparison of the accuracy and precision of a graduated cylinder and a pipet
EXPERIMENTAL MATERIALS
Part A
A 50mL graduated cylinder
A balance
50.0mL deionized water
A rubber policeman
Part B
A 100mL beaker
A 50mL graduated cylinder
A volumetric pipet
120.0mL deionized water
A thermometer
A rubber policeman
EXPERIMENTAL METHODS
Part A: Density of water
1. An empty, dry 50mL graduated cylinder was obtained.
2. The mass of graduated cylinder with using a balance.
3. 10.0mL of deionized water was added to the 50mL graduated cylinder.
4. Mass of 10.0mL of deionized water + the cylinder was measured with balance.
5. To take only mass value of the 10.0mL deionized water, the mass value of the graduated cylinder was subtracted from the mass value of the 10.0mL of deionized water + the cylinder.
6. Density of 10.0mL of deionized water was calculated by its’ mass and volume. (d=m/v)
7. The exact density of the 10.0mL of deionized water was recorded on the data sheet.
8. Deionized water was added up to the 30.0mL mark of the 50mL graduated cylinder and Steps 3 to 7 were repeated for 30.0mL.
9. Deionized water was added up to the 50.0mL mark of the 50mL graduated cylinder and Steps 3 to 7 were repeated for 50.0mL.
Part B: Accuracy and Precision
Using a graduated cylinder
1. An empty, dry 100mL beaker was obtained and measured its’ mass with a balance.
2. 10.0mL of deionized water was added to a graduated cylinder and transferred it to the 100mL beaker.
3. Mass of 10.0mL of deionized water + the beaker was measured.
4. To take only the mass value of the 10.0mL deionized water, the mass value of the beaker was subtracted from the mass value of the 10.0mL deionized water + the beaker.
5. Density of 10.0mL of deionized water was calculated by
References: 1. Miller, Dionne A. (Third Edition.); SCC201 Fundamentals of Chemistry 1 Laboratory Manual; CENGAGE Learning, 2009, p 29 – 31. RAW DATA SHEETS See attached sheets.