close
test_template

An Experiment on Water's Surface Tension in Different Sodium Chloride Concentration

Human-Written
download print

About this sample

About this sample

close
Human-Written

Words: 602 |

Page: 1|

4 min read

Published: Mar 14, 2019

Words: 602|Page: 1|4 min read

Published: Mar 14, 2019

Table of contents

  1. Abstract
  2. Introduction
  3. Experimental Method
  4. Discussion

Abstract

To determine the surface tension of water with different concentrations of sodium chloride, capillary rise was examined. This was done by examining the height a liquid rose in a capillary depending on the concentration. The liquid was but in an apparatus containing the capillary, and the system was disrupted and the let sit to return to equilibrium. The heights at equilibrium for each sampe was taken at each concentration (water, 1M NaCl, 2M NaCl, 3M NaCl, 4M NaCl).

Introduction

Surface tension is defined by the work needed to expand the surface by a unit area, and is a measure of free energy within the system. This difference in surface tension between five solutions, was determined by the difference in the rise of the solution in a capillary tube in comparison to one another. The equation used to determine surface tension from this capillary rise is defined as

γ_1=1/2 (h+ r/3)rρg

Where γ_1 is the surface tension

h is the height recorded

r is the radius of the capillary tube used

ρ is the density of the liquid

g is gravitational acceleration

With this information the surface tension can be found for different concentrations, along with the general trend of surface tension versus the concentration of ions in a solution.

Experimental Method

A dried capillary tube is placed into an apparatus containing a 250mL test tube capped with a rubber stopper. There is two holes in the stopper, one for the capillary and another for an adapter as a means to disrupt the system. The five solutions are placed in the tube for different trials, where the capillary height would be measured. After the liquid is placed in the container the system is disrupted using a particular plunger to suck up the liquid and then releasing to have the liquid return to equilibrium. After this is done the readings are taken. Five trials is done for each of the samples of different concentration.

Discussion

Overall the results for the surface tension calculated from the capillary height were inconsistent with a high standard deviation. The mean values of the height of the tube at different concentrations were used to create a graph following the change of NaCl concentration to the change in surface tension. As an overall trend, the surface tension was show to increase with the increase of ions present and gave the equation y = 2850.9x + 69.812 (graph 2), where the slope is positive 2850.9 suggesting this increase. Another factor influencing the increased surface tension was due to the density increasing while the concentration was raised.

For the height recorded in the capillary at each different concentration (Table 1), the mean calculated values are as follows, DI Water (control): 3.6 ± 0.2 cm, 1M NaCl: 3.5 ± 0.4 cm, 2M NaCl: 3.0 ± 0.2 cm, 3M NaCl: 3.6 ±0.7 cm, 4M NaCl: 3.3 ±0.2 cm. This data suggests a lower in capillary height due to the increased NaCl concentration

For the calculated surface tension the average and standard deviation (Table 2) for each concentration (Mol/ cm

3) were as follows: 0.000 Mol/ cm

3: 71.99 ± 5.34 dyn/cm, 0.001 Mol/ cm

3: 73.91 ± 10.54 dyn/cm, 0.002 Mol/ cm

3: 66.03 ± 5.05 dyn/cm, 0.003 Mol/ cm

3: 84.87 ± 17.72 dyn/cm, 0.004 Mol/ cm

Get a custom paper now from our expert writers.

3: 80.77 ± 5.74 dyn/cm. the general slope when these points were plotted against concentration was 2850.9. this value was then used to calculate the layer thickness, which was calculated to be 1.15cm.

Image of Alex Wood
This essay was reviewed by
Alex Wood

Cite this Essay

An Experiment On Water’s Surface Tension In Different Sodium Chloride Concentration. (2019, March 12). GradesFixer. Retrieved November 19, 2024, from https://gradesfixer.com/free-essay-examples/an-experiment-on-waters-surface-tension-in-different-sodium-chloride-concentration/
“An Experiment On Water’s Surface Tension In Different Sodium Chloride Concentration.” GradesFixer, 12 Mar. 2019, gradesfixer.com/free-essay-examples/an-experiment-on-waters-surface-tension-in-different-sodium-chloride-concentration/
An Experiment On Water’s Surface Tension In Different Sodium Chloride Concentration. [online]. Available at: <https://gradesfixer.com/free-essay-examples/an-experiment-on-waters-surface-tension-in-different-sodium-chloride-concentration/> [Accessed 19 Nov. 2024].
An Experiment On Water’s Surface Tension In Different Sodium Chloride Concentration [Internet]. GradesFixer. 2019 Mar 12 [cited 2024 Nov 19]. Available from: https://gradesfixer.com/free-essay-examples/an-experiment-on-waters-surface-tension-in-different-sodium-chloride-concentration/
copy
Keep in mind: This sample was shared by another student.
  • 450+ experts on 30 subjects ready to help
  • Custom essay delivered in as few as 3 hours
Write my essay

Still can’t find what you need?

Browse our vast selection of original essay samples, each expertly formatted and styled

close

Where do you want us to send this sample?

    By clicking “Continue”, you agree to our terms of service and privacy policy.

    close

    Be careful. This essay is not unique

    This essay was donated by a student and is likely to have been used and submitted before

    Download this Sample

    Free samples may contain mistakes and not unique parts

    close

    Sorry, we could not paraphrase this essay. Our professional writers can rewrite it and get you a unique paper.

    close

    Thanks!

    Please check your inbox.

    We can write you a custom essay that will follow your exact instructions and meet the deadlines. Let's fix your grades together!

    clock-banner-side

    Get Your
    Personalized Essay in 3 Hours or Less!

    exit-popup-close
    We can help you get a better grade and deliver your task on time!
    • Instructions Followed To The Letter
    • Deadlines Met At Every Stage
    • Unique And Plagiarism Free
    Order your paper now