Paper Towel Lab Report

5. Calculate the mass of the water by subtracting “Mass A” from “Mass B.” Record the mass of the water in Data Table 4.

1.) Measure out 20ml out of the water and place it into a glass beaker

Weigh the beaker with water in it, record this value in Data Table 1 and subtract the mass of the beaker to get the mass of the water. Record this value in Data Table 1.

Purpose: Weighing objects. Figuring out the density with an object by calculated volume and Archimedes’ Principle.

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

Abstract: The overall question that was trying to be answered during this experiment was: Which paper towel brand is the strongest? Before completing the experiment, the hypothesis was that out of Bounty, Brawny and Sparkle, Bounty would be the strongest paper towel.

Literature Review: Research into this topic shows that it is not as simplistic as might be imagined, but has in fact been examined as part of rigorous research projects undertaken on behalf of paper towel manufacturers (Beuther et al, 2010). The ways in which paper towels absorb, and therefore the rates at which they are able to absorb, vary depending on the microscopic fiber structures within individual paper towels, which of course vary greatly depending on the manufacturing materials and processes in the making of each brand of paper towels (Beuther et al, 2010). Fiber types and construction patterns have also been demonstrated to have a large impact on absorbency in natural and synthetic textiles examined in a similar experiment (Beskisiz et al, 2009). Both of these pieces of research suggest certain controls for the paper towel experiment described herein (Beuther et al, 2010; Bekisiz et al, 2009).

Copied the observations table in our notebook. Then recorded the mass of the beaker using the balance and wrote down the measured mass in the observation

The density of water is its mass divided by its volume. In this case, the mass of water was determined by subtracting the final mass of the glassware with water by the initial mass of the glassware without water. The volume was determined by observing closely which line (marked on the sides of each glassware) the water reached and reporting the most precise measurement. Based on the class data, the average densities of water and its standard deviations were: 50-mL beaker – avg: 0.90 g/mL, stand dev: 0.12, 10-mL graduated cylinder – avg: 0.980 g/mL, stand dev: 0.0600, 10-mL volumetric pipette– avg: 0.9800 g/mL, stand. dev: 0.06499, 50-mL burette– avg: 0.969 g/mL, stand. dev: 0.140. The average density of water compares our experimental value to the true value. This means that the closer our values are to the true density of water, which is approximately 0.998 g/mL at 18.89°C, the more accurate our data is. Furthermore, the standard deviation measures how precise our results are with one another.

The purpose of this experiment is to find out which brand of paper towel, Decorator or

The purpose of this lab was to find out what tissue was the strongest, by using water and pennies.

Record the sample mass in your notebook. Remember to record all digits on the balance. Closed toed shoes and goggles are REQUIRED for the lab

In conclusion, we did not face any problems in our experiment. Our method differed from other groups because we collected our data by how much left over water there was, while some other groups collected the weight of the leftover water and how much water the paper towels absorbed. We determined what a “quicker picker upper” paper towel was by seeing how much water certain brands could pick up in 5 seconds. If our group could do this experiment over again, we would consistently use the funnel to pour water into the graduated cylinder, to prevent from water loss and having to repeat the trial again. Also, we would measure the leftover water more precisely to have an accurate

This experiment illustrates the importance of handwashing and proves that hand washing is worth it. Since our hands are constantly coming into contact with ourselves and others, touching surfaces, grabbing objects, being sneezed into, etc., keeping our hands clean is one of the most effective, yet simple way we can take to avoid getting sick and spreading germs to others. Many diseases and conditions are spread by not washing hands with soap and clean, running warm water. “The human skin is a host to anywhere between 10,000-10,000,000 bacteria per square centimeter and since health care providers come into contact with pathogenic bacteria by being engaged in patient care, hand washing can reduce the risk of spreading diseases (page 3).” The objective of the experiment is to test the effectiveness of hand washing and demonstrate normal flora. This report presents the procedures and materials for the experiment, the experiment's results, and an analysis of those results.

After that, it is crucial to convert the mass to volume. The water density at a temperature will aid this process. The compliance of the Volume Occupied by 1.000g of Water Weigh in Air table is deemed necessary throughout the comparison.