Densities Of Liquids Lab Report
Measurement of the Densities of Water and Alcohol
Phuc Truong and Shane Steele
Data Collected: September 8, 2014 2:05 P.M.
Purpose:
The purpose of the experiment is to measure the densities of liquids. Specifically, the two liquids that were used and measured in the research were deionized water (H2O) and alcohol (C2H5OH).
Methods:
Density is an intensive quantity that cannot be visually identified. Therefore, the most straightforward approach to this problem was to record the measurements of mass and volume. For volume of each liquid, the instruments used were a 50ml burette, a 50ml graduated cylinder and a 10ml gravity pipette. For each instrument above, the measurements were repeated 3 times. The mass of each sample was recorded by an electronic balance with the smallest gradation of 0.01g. The information collected then was used to determine the densities of water and alcohol.
Discussion:
The goal of using three different instruments for volume and …show more content…
Alcohol can be in an a mixture with water or a pure liquid. For this question, pure alcohol was assumed. Like measurements of water, with 3 different instruments, 3 different results were collected. The measured densities of alcohol were 0.67±0.04 g/ml, 0.803±0.004 g/ml and 0.790±0.004 g/ml. The accepted literature value of the density of pure alcohol is 0.78504 g/ml.3 From the results, it can be said that the density measured by the gravity pipette yielded the greatest accuracy.
From the experiment, it can be concluded that the instrument used in the process can affect greatly to the result. While the tools with smaller least counts give higher precision and accuracy, those with greater least counts do not. Furthermore, the result from the experiment is consistent with the fact that alcohol is lighter than water.
I have neither given nor received unauthorized aid on this piece of work, nor have I knowingly tolerated any violations of the Honor
Phuc Truong and Shane Steele
Data Collected: September 8, 2014 2:05 P.M.
Purpose:
The purpose of the experiment is to measure the densities of liquids. Specifically, the two liquids that were used and measured in the research were deionized water (H2O) and alcohol (C2H5OH).
Methods:
Density is an intensive quantity that cannot be visually identified. Therefore, the most straightforward approach to this problem was to record the measurements of mass and volume. For volume of each liquid, the instruments used were a 50ml burette, a 50ml graduated cylinder and a 10ml gravity pipette. For each instrument above, the measurements were repeated 3 times. The mass of each sample was recorded by an electronic balance with the smallest gradation of 0.01g. The information collected then was used to determine the densities of water and alcohol.
Discussion:
The goal of using three different instruments for volume and …show more content…
Alcohol can be in an a mixture with water or a pure liquid. For this question, pure alcohol was assumed. Like measurements of water, with 3 different instruments, 3 different results were collected. The measured densities of alcohol were 0.67±0.04 g/ml, 0.803±0.004 g/ml and 0.790±0.004 g/ml. The accepted literature value of the density of pure alcohol is 0.78504 g/ml.3 From the results, it can be said that the density measured by the gravity pipette yielded the greatest accuracy.
From the experiment, it can be concluded that the instrument used in the process can affect greatly to the result. While the tools with smaller least counts give higher precision and accuracy, those with greater least counts do not. Furthermore, the result from the experiment is consistent with the fact that alcohol is lighter than water.
I have neither given nor received unauthorized aid on this piece of work, nor have I knowingly tolerated any violations of the Honor