Lab Report 11

Lab Report
A test tube, also known as a culture tube or sample tube, is a common piece of laboratory glassware consisting of a finger-like length of glass or clear plastic tubing, open at the top,usually with a rounded U-shaped bottom.
A pipette is a laboratory tool used to transport a measured volume of liquid.
A beaker is a simple container for stirring, mixing and heating liquidscommonly used in many laboratories. Beakers are generally cylindrical in shape, with a flat bottom

Research Question: What is the standard deviation of the data collected?
Hypothesis: Density of wateris a gram per mili meter
Variables:
-Independent: Volume of the water; the best way to find water volume is to pour the water into the graduated cylinder and read the volume.
-Dependent: Mass; isthe quantity of inertia possessed by an object or the proportion between force and acceleration referred to in Newton's Second Law of Motion.
Materials and methods:
a. Materials:
-50ml Graduatetest tube
-10ml pipette
-50ml beaker
-Wash bottle with water
- Pro- pipette pump
-Digital balance

b. Method
1. With the use of the pro- pipette pump, we filled a pipette with 10ml of water andpouring it in the graduated test tube until get 30ml
2. We do the same procedure, but only with 5ml of water per 4 times and pour it in the graduated test tube
3. Using the same pipette wemeasured 1ml of water. We poured it in a clock lens and weight it in the balance
4.We repeated the step N°3, 10 times and recorded the weights. We calculated the standard deviation of the set of data
|| | | | | | | | | |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Mass | 0.901 | 0.929 | 0.941 | 0.908 | 0.776 | 1.013 | 0.81 | 0.856 | 0.854 | 0.815 |
| | | | | | | | | | |prom | 0.8803 | | | | | | | | | |
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Standard | 0.0716691 | | | | | | | | |...