The great thing about a model is that students can demonstrate understanding in a variety of ways. Calculate the mass of the liquid for each trial. First the metal objects were weighed using an electronic scale. Materials: 4 metal samples Balance 50 ml graduated cylinder Water Paper towels Apparatus: Pre- Lab Questions: 1. Physical property is a characteristic of a substance that does not involve a chemical change such as density color or hardness.
That difference was the volume of water emptied into the flask. Therefore if a bottle of grey goose vodka is 80 proof then its liquid solution has a volume of 40% alcohol. After finding the density of the unknown metals by dividing the mass by the volume, the groups had to exchange data and find the average densities of the two unknown metals. Density, Ice, Ice cube 641 Words 4 Pages Abstract The purpose of this experiment was to identify whether density is an extensive or intensive physical property. The only substance that breaks this rule is ice. The qualitative observations included a silver color and had quadrilateral shapes to them. Period 0 Density Lab Purpose The purpose of the lab is to find out the density of stoppers, the density of a 100% sucrose solution, and to figure out the density and the percentage of sucrose in the unknown solution.
Data Summary The data trend for Figure 1 was that the larger the mass, the more volume it would have. These service industries include transportation services, such as airlines, cruise ships and taxicabs, hospitality services, such as accommodations, including hotels and resorts, and entertainment venues, such as amusement parks, casinos, shopping malls, music venues and theatres. Tourism is vital for many countries, such as France, Egypt, Greece, United States, Spain, Italy,and Thailand, and many island nations, such as The Bahamas, Fiji, Maldives, Philippines and the Seychelles, due to the large intake of money for businesses with their goods and services and the opportunit … y for employment in the service industries associated with tourism. The method used for determining the density of a substance depends on the nature of the substance. Density of a cube: Using a balance, record the mass of the cube to the nearest tenth of a gram. In order to find the volume of the water, I took note of the starting point of the water in the buret, then took note of the ending point of the water after about 30 mL were into the flask.
The findings from this experiment were 2. Safety: Wear goggles and a lab apron or coat. This is demonstrated in the video below. The only substance that breaks this rule is ice. Then using water, the beakers were filled half way.
The relationship of averages and different analysis techniques to percent error will also be explored. For example, in this example, the student added 3 dots in the lowest mass, 4 in the next, 5 in the following, all the way up to 7 in the highest mass cylinder. The task for our lab was to determine the density of water and compare our recordings to the actual density of water listed in our lab packet. Lastly, the density given for my unknown was listed at 20 °C, but I measured the room temperature to be 19. Part I: Density of Unknown Liquid 1. These service industries include transportation services, such as airlines, cruise ships and taxicabs, hospitality services, such as accommodations, including hotels and resorts, and entertainment venues, such as amusement parks, casinos, shopping malls, music venues and theatres.
Controlling the Controlled Variables: The water and electronic scale were controlled. Design Research question: If mass and volume are correctly measured can the density of an. Sometimes I also think it is referencing how far apart objects are for each other. Student: How things are place or the order things are in. Students that add particles, but add random numbers as opposed to an increasing number for the highest mass. I let students know that after they collect their data for one set and rotate to the next set and there are no available stations, the students can begin answering questions for the set they already completed while they wait. Given that density is a measurement of mass over volume, both of these quantities would have to be determined experimentally, prior to proceeding with the calculation of the density, for each of the six subjects tested.
. Density, Kilogram, Liquid 463 Words 2 Pages Precision: Balance Lab Worksheet Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid. In order to find the density, I simply divided the mass found by the volume found. Each Friday I will ask to see your completed prelab before I allow you to enter the lab. The discussion might unfold like this: Teacher: Earlier, we were saying that a physical property that was a characteristic that you can see or measure. The reason I mention this is that in this quick mini lesson, I only quickly review how to calculate density.
Calculate the slope of the line in the graph above. Introduction In the density lab unknown metals were weighed using beakers filled with water and an electronic scale. The prelab must be completed prior to the day of the experiment. To find out the percentage of sucrose in the unknown solution, there has to be a comparison between the density of the unknown solution and the densities of different percentages of sucrose solutions. Then, the mass will be divided by the volume. The density of a sample will be found experimentally and compared to a known value.