Water on a Clean, Dry Penny Trails are given below:   Trial Number of drops 1  19 2  16 3  15 4  19 5  24 Observation: The cohesion and surface tension of water became apparent when the drops of water added to the penny reached the penny's edge. Once the water had reached the edge, began to see a bubble of water forming on top of the penny until it overflowed.

Appl Of Ms Excel In Analytical Chemistry
2nd Edition
ISBN:9781285686691
Author:Crouch
Publisher:Crouch
Chapter14: Chromatography
Section: Chapter Questions
Problem 9P
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Water on a Clean, Dry Penny Trails are given below:  

Trial
Number of drops
1
 19
2
 16
3
 15
4
 19
5
 24
Observation: The cohesion and surface tension of water became apparent when the drops of water added to the penny reached the penny's edge. Once the water had reached the edge, began to see a bubble of water forming on top of the penny until it overflowed.
 
Questions: 
 
1.  Describe two things that affected your precision.  Remember that Accuracy refers to how close measurements are to the "true" value, while precision refers to how close measurements are to each other.
 
2.  In your own words, give a description of surface tension. 
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