Biology Lab for virtual school.. Lesson 1.04 Essay

When an object falls onto the surface, it has to push the water system molecules apart. If the issuance of the weight of the object is insufficient to match the attractive forces between molecules in the surface tier, the object will non enter the surface.Molecules of most detersives and slashs be long chain hydrocarbon molecules with an ionic group at one end, unremarkably carrying a negative charge, consequently making it an anion.www.sciencedaily.com/articles/s/soap_bubles.htmlWhen the drop of detergent is added to the powdered surface, the initial effect is to draw the powder back to the edges precise rapidly as the detergent molecules form their own surface layer with a lower surface strain than the water. As the detergent gradually mixes with the water, the powder begins to sink, and a needle will now pass by means of the surface with ease under its own weight. However, the calcium and magnesium salts of some(prenominal) detergent molecules are soluble, so detergent s still lower the surface accent of hard waterEdutech.boisestate.edu/snetsonc/examples/surface-tension_tutorial.htmlHypothesisIf you add soap to water, than it will hang the effect on the surface tension.ProcedureControl Is the water hip-hop waterIndependent Variable Is the soapDependent Variable Is the drops of soap you fit in on the penny1. I received a beaker filled with whack water.2. I took a pipet and filled it up with water from the beaker. 3. I began to add drops of water to a penny, which was heads up, every one second from a height of centimeter and counting how many drops I had put on it. 4. After I added the drop that caused the water to flow over, I preserve how many drops stayed on the penny, and I then dried the penny with a paper towel. 5. I repeated steps two through four-spot, four times.6. I took 100 ml of water and poured it into a beaker.7. I got 3 ml of soap.8. I added the 3 ml of soap to the beaker and stirred the beginning 40-50 times with a fresh pi pette. 9. I filled the pipette with the smarmy water solution and began to start adding drops of the solution to the same penny, from the distance of centimeter, at a rate of one drop per second. 10. After adding the drop that caused the buttery water to flow over, I recorded how many drops stayed on the penny, and I washed the penny under running peeing And dried it with a paper towel. 11. I repeated steps nine and ten, four more than times.ObservationsThe soap is thick and the penny is rough. The tap water latest hourlong thanthe fulsome waterDataDrops of Tap and Soapy wet Added to a PennyTrail 1 Trail 2 Trail 3 Trail 4 Trail 5 AverageDrops of Tap Water 35 28 11 15 39 25.5 Drops of Soapy Water 20 16 11 26 15 1.3I got my modal(a) from using Microsoft ExcelConclusionI devote accepted my conjecture because of the results of the data from this lab. In my hypothesis I stated that the surface tension of the tap water is higher than that of fulsome water. My data supports this hypothesis because the average drops of tap water the penny could hold was 25.5 while the average drops of greasy water was 17.3 drops.This shows that soapy water has a lower surface tension, thus making it not able to hold as many drops of soapy water could on the penny. I noticed in my data that in trials 3 and 4 that the penny held more drops of soapy water than tap water. This was not in accord with my hypothesis, and I think it may have been due to a weakness in the experiment. When I used the pipette to suction water and then drop it onto the penny may not have been doing it exactly the same way each time. All in all, my experiment conducted that my hypothesis was correctApplicationThis relates back to the way soapy water and tap water act in everyday situations. The soap causes the surface tension to be less than that of water so if you poured soapy water onto a kitchen counter the solution would disperse as in the main as it could over the entire counter. Tap water on the some other hand when spilled on a counter will naturally see to come together in water colonies. The molecule sin the tap water will move towards each other and stack on top of each other thus leaving some separate of the counter dry and some parts with canals of water.