# CHM130 Lab 2

Powerful Essays
1057 Words
Grammar
Plagiarism
Writing
Score
CHM130 Lab 2
CHM130
Lab 2
Measurements: Accuracy and Precision A. Data Tables (36 points)
Data Table 1
Measurement
Data
Length of aluminum plastic packet 5 cm
Height of aluminum plastic packet 6.5 cm
Temperature of faucet water 23°C
Temperature of ice water 11°C
Volume of water in 10-mL graduated cylinder 10 ML
Volume of water in 50-mL graduated cylinder 10 ML Data Table 2
Measurement
Data
Inside diameter of 50-mL graduated cylinder 2.5 cm
Height of 50-mL graduated cylinder 9.5 cm
Water temperature 22°C
Initial volume of water in 50-mL graduated cylinder
10.0 mL
Mass of water in the 50-mL graduated cylinder (remember, 1 g of water weights 1 mL since its density is 1 g/mL) 10 g
Volume of water and aluminum shot in 50-mL graduated cylinder 17.5 mL
Mass of aluminum shot (given on outside of packet) 19.92 g
B. Follow-Up Questions (Show all calculations)
Part I (Each question is worth 10 points.)
1. Convert the length and height measurements for the packet that contains the aluminum shot from units of cm to units of mm using the unit-factor method.
- L= 5 cm = 50 mm
- W= 6.5 cm = 65 mm
2. Convert the temperature measurements for the faucet water and the ice water from oC to oF, using the following equation: oF = 1.8(oC) + 32.
- Faucet Water = 73.4°F
- Ice Water = 51.8°F
3. Convert the volumes of the water in the 10-mL and 50-mL graduated cylinders from mL to L, using the unit-factor method.
- 10 mL water, 10 mL = .01 L
- 50 mL water, 10 mL = .01 L
4. Looking at your measurements for the volumes of water in the 10-mL and 50-mL graduated cylinders, are your values identical? Discuss at least two reasons why the measurements were not identical.
- Mine were identical because I figured they were supposed to be and let the pipette fill completely. They would have not been identical though if you had not allowed the pipette to fill the same amount each time or if you did not fill it all the way each time.
Part

## You May Also Find These Documents Helpful

• Good Essays

The isotopes of an element have the same amount of protons, but a different amount of neutrons, so they vary in size.…

• 920 Words
• 7 Pages
Good Essays
• Satisfactory Essays

3. Measure out between 20 milliliters and 40 milliliters of the unknown HCl solution. This amount must be different than the amount used in part I.…

• 790 Words
• 4 Pages
Satisfactory Essays
• Good Essays

1. Use the concepts/vocabulary of density to explain why the liquids formed layers in Part I of the procedure. (8 pts)…

• 1556 Words
• 6 Pages
Good Essays
• Good Essays

graduated cylinder (remember, 1 g of water weights 1 mL since its density is 1 g/mL)…

• 1045 Words
• 5 Pages
Good Essays
• Satisfactory Essays

1. Calculate the mass (g) of the liquid for each trial (A). (Subtract the mass (g) of the empty graduated cylinder [1] from the mass (g) of the graduated cylinder with liquid [3])…

• 424 Words
• 2 Pages
Satisfactory Essays
• Good Essays

between these two masses is the mass of zinc chlorine produced. Subtract the original mass of the beaker from the mass of the beaker plus the zinc chloride produced. Show your work. (20 points)…

• 1376 Words
• 6 Pages
Good Essays
• Good Essays

Mass of water in the 50mL graduated cylinder (remember, 1 g of water weights 1mL since its density is 1 g/mL)…

• 1482 Words
• 7 Pages
Good Essays
• Powerful Essays

1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.)…

• 732 Words
• 3 Pages
Powerful Essays
• Good Essays

1. First we need a vessel filled approximately halfway with water that also has markings of measurement on them. Note the original volume of water (this will be used later)…

• 351 Words
• 1 Page
Good Essays
• Better Essays

Since a graduated cylinder is usually used for liquid measurement, students think they need to put water in the cylinder. This is not true for this activity. The graduated cylinder will be kept clean and dryfor this activity. It is also important to remember that in the metric system, one mL is the same volume as one cubic centimeter (1 ml = 1 cm3).…

• 835 Words
• 4 Pages
Better Essays
• Good Essays

Table C-Mass of a Liquid- Mass of the Gradulated Cylinder (only air) (g)- 16.2g Combined Mass of Gradulated Cylinder & Water…

• 168 Words
• 1 Page
Good Essays
• Good Essays

3. After we filled up the graduated cylinder with water and dropped one of the metal rods and the water, the water amount that increased in the cylinder was the volume of the rode that was placed in.…

• 695 Words
• 4 Pages
Good Essays
• Good Essays

The sources of error in the Water Displacement method were mostly due to the precision of measurement location on the graduated cylinder. Since the graduated cylinder only measured to the nearest milliliter, we had to estimate to the 0.5. This in turn, caused our answers to be slightly estimated. In addition, we rounded our mass to the nearest thousandth place, consequently the density was rounded…

• 426 Words
• 2 Pages
Good Essays
• Better Essays

2. Place approximately 50 ml of the various solutions, each cup receiving a separate solution. Suggestion, measure the di water with the graduated cylinder, and fill the other cups to the same level…

• 1195 Words
• 5 Pages
Better Essays
• Good Essays

Graduated cylinders are for measurement of an amount of liquid. The volume of liquid can be estimated to the nearest 0.1 mL with practice.…

• 878 Words
• 4 Pages
Good Essays