The accuracy and precision with which one performs experiments is a very important factor in their success as a scientist. Back in the day, Archimedes was posed with a problem. In part A, the mass of the graduated cylinder was found to the nearest thousandth of a gram because that is how accurate the balance is.
Archimedes was perplexed though because he could not find the volume of the crown. In this laboratory, the accuracy and precision of my own laboratory techniques was tested by finding the mass, volume, and eventually density of a brass rod and comparing it to known values.
We can also assess the quality of our density measurements by comparing our measurements to that of the known measurements. In part C, The same technique as in part B was used, but it was applied to an unknown metal.
Once he found the volume of the water, he knew it had to be the same as the volume of the crown because the volume of a liquid does not change with its container, only its shape. The purpose of having a control is to test for how much change occurred in the experiment; it serves as a basis for comparison.
It is Labpaq lab techniques and measurements and warm to the touch. He remedied this problem by displacing the crown with water and seeing how much water flowed out of a filled container when the crown was allowed into it.
In part B, this cylinder and its most accurate reading were then used to find the density of a known metal by first finding the mass of the metal using the balance to its most accurate reading.
The brass cylinder is about an inch and a half in length, 4mm in diameter with sawed-off edges. The mass was found using the balance and the density values were made sure to be within 0.
Using standard deviation to find the average variation of measurement, we can find a mean line to symbolize our data and use that as the most accurate measurement because it symbolizes hundreds of trials within the time it took to make four or five.
Results from this analysis will tell how accurate the cylinder is and how many significant figures are usable in calculating the density of any substance using its volume measurement.
The mass of three measurements and the average volume of the three measurements was found to increase the accuracy. The king did not know whether or not his crown was truly made of gold.
In part B, the volume of the metal rod was calculated by subtracting the calculation of the water and the metal combined volume from the water only volume.
The actual mass of the water was calculated by using its known density at The brass rod resonates at a high pitch as compared to typical vocal ranges.
It is golden with stain spots in color, and smells metallic. Kirill Polyanskiy Introduction The purpose of this experiment is to test the accuracy and precision of the person doing the experiment as well as find the density of a metal rod.
Our measurements will inevitably have variation within them, and to find the amount of variation, we use a statistical process called standard deviation. Upon taking the ratio, he found that the density of the crown was less than that of the pure gold sample he was given.
It was not a perfect shape such as a cube or sphere, and because of this, it was difficult to find the volume of the crown. Materials and methods The material being analyzed in this laboratory is brass.
This method is statistically relevant according to the lab manual. For part A, the accuracy of the graduated cylinder was calculated by finding the mass of the water through subtracting the mass of the empty cylinder from the mass of the full cylinder. The crown-maker had alloyed the crown with a less-worthy metal!
The purpose of having standards and constants in this experiment to have a control.Hands-On Labs produces online science lab kits that include modern pedagogy, cloud-based learning platforms, and hands-on lab experiments that mirror the classroom laboratory.
Recent Posts. View Notes - Lab Report #1 - Lab Techniques and Measurements from CHE at Arapahoe Community College.
Figure 2: Data collected to measure tem 97%().
Free Essay: Laboratory Techniques and Measurements Lab 1 The purpose of this lab was for the student to get involved with his or hers new lab kit as well as. A Student Researched Chemistry Lab about Laboratory Techniques where the purpose is to test the accuracy and precision of the person doing the experiment.
Labpaq Laboratory Techniques And Measurements Experiment Chemistry Answers.
Laboratory Techniques and Measurements Lab 1 The purpose of this lab was for the student to get involved with his or hers new lab kit as well as being able to know, identify and use each other tools provided in the kit. Another key learning aspect of this lab is to teach the student how to measure properly the many.
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