I assume 0 ppt would be perfect precision, so 1. My accuracy was very high, but my precision was not quite as good. In the end, my data was fairly accurate with the actual data, so the experment was a success.
For example, the precision for the water was found by this equation: Therefore, I should be even closer to the actual density. This gave me an answer of I subtracted the intial amount of liquid in the buret from the final amount of liquid in the buret.
My data from the unknown substance turned out incredibly well. With my data, my equation for the water was 0. This academia was first published 25 Sep and last revised 13 Feb This difference was how much liquid was dispensed.
Some of my error can be accounted for by a leak in my buret. A precision of In order to find the density, I simply divided the mass found by the volume found.
To find the average density, I added the three densities I found, then divided that total by three to find the average. This same method was used to find the volume of water in the flask. It seems that I was lucky to have gotten such good accuracy with bad precision.
Next 18 Sep A few drops of the liquid inside seemed to drip out from right above the bottom where it was supposed to come out. I simply subtracted the mass of the empty flask and rubber stopper from the mass of the full flask and rubber stopper.
The equation for the water was 0. Finally to find the error, I found the absoulte value of my measured density minus the actual density. He scrapbooks yonder every minute or three. However, my accuracy turned out to be very high, as my error was very low. Precision was found by taking the absolute value of the highest density minus the lowest density, dividing that difference by the average density, and then multiplying that answer by A sample equation would be Also, I may have gotten finger prints on the flask, which would have added a slight bit of extra weight that could throw my calculations off.
An example would be My precision was 1.
My accuracy was also high, as my error was only 0.For example, the uncertainty in the density measurement above is about g/cm 3, so this tells us that the digit in the tenths place is uncertain, and should be the last one reported.
The other digits in the hundredths place and beyond are insignificant, and should not be reported. SAMPLE LABORATORY REPORT Measurement and Estimation [Always state the purpose of the laboratory exercise or experiment] the grass density was fairly uniform over the entire plat—except for those areas taken by sample_lab_report.
Los Angeles City College Chemistry 51 Fall Experiment 3 Introduction to Density INTRODUCTION The purpose of this experiment is to. Lab Report on Density Measurement Essay INTRODUCTION Background of the Experiment Mass density describes how heavy an object is.
Defined by the Greek letter ρ, read as rho, density is a basic yet important physical property of matter. Density Measurement Lab Report - Download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online. Essay on Density Lab Words | 3 Pages. Objective: The objective of this lab was to calculate the densities of various objects using different techniques.Download