StudentShare
Contact Us
Sign In / Sign Up for FREE
Search
Go to advanced search...

Techniques - Lab Report Example

Cite this document
Summary
The purpose of this experiment was to find the mass of NaCl in an aliquot of NaCl solution, theoretically and experimentally and then compare the results. To find the theoretical mass, 6 grams of NaCl was dissolved in a beaker with 50 mL of deionized water and then analytically…
Download full paper File format: .doc, available for editing
GRAB THE BEST PAPER98.5% of users find it useful
Techniques lab
Read Text Preview

Extract of sample "Techniques"

Download file to see previous pages

Calculations performed on the changes in mass revealed that the experimental mass of the NaCl was 1.464 g. The -1.942% error between the two results was attributed to experimental errors arising from the improper use of the pipets during the transfer of the solution to the evaporating dish for heating. The results obtained showed that the difference in the masses between the expected and experimental results to be small (-0.029 g), resulting in a relatively small % error of -1.942%. The % error was caused by systematic errors resulting from improper use of the pipet during the transfer on the 25 mL NaCl solution to the evaporating dish.

Minute air bubbles might have been sucked together with the NaCl solution, resulting in a reduced amount of NaCl being heated at the end, thus lowering the final mass. The pipet used in the experiment has a precision of uncertainty of ±0.01 mL; therefore the 25 mL taken from the volumetric flask was between 24.99 mL – 25.01 mL. This uncertainty is relatively low, making the pipet’s readings relatively precise, thus reducing the chances of random errors resulting from observational mistakes during the filling up of the pipet. a. Filling the 100 mL volumetric flask beyond the mark would lead to a lower actual (experimental) molarity.

This is because adding more water will make the solution more dilute, thus lowering the molarity. b. The density of the solution would decrease if the volumetric flask was topped beyond the mark because the density if governed by the formula Density = Mass / Volume1. Therefore, increasing the volume would lead to a subsequent decrease in the density. a. Having the liquid level in the pipet being below the line would lead to a reduction of the mass of the NaCl obtained after the subsequent heating because the amount of NaCl pipet is less than the required amount. c. Using the pipet to deliver the NaCl solution to

...Download file to see next pages Read More
Tags
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Techniques lab Report Example | Topics and Well Written Essays - 1000 words”, n.d.)
Retrieved from https://studentshare.org/chemistry/1631239-techniques-lab
(Techniques Lab Report Example | Topics and Well Written Essays - 1000 Words)
https://studentshare.org/chemistry/1631239-techniques-lab.
“Techniques Lab Report Example | Topics and Well Written Essays - 1000 Words”, n.d. https://studentshare.org/chemistry/1631239-techniques-lab.
  • Cited: 0 times

CHECK THESE SAMPLES OF Techniques lab

Mathlab Simulink Project

The reliability of hereditary material in error correction and coding depends on the available DNA repair within a communication toolbox of error correction and coding.... Damages are continuously controlled and corrected within the error correction and coding methods as shown in… The principles originate from the error correction encoder through the communication channel to error correction decoder....
4 Pages (1000 words) Lab Report

The Ability to Perceive a Minor Change in Luminosity

hellip; The objective of this lab is a comparative study of four CS tests, namely Pelli-Robson CS test, Cardiff CS test, Distich CS test and Cambridge plates test.... This paper “The Ability to Perceive a Minor Change in Luminosity” will look at the ability of visual systems to perceive a minor change in luminosity between regions that are not separated by definite borders....
4 Pages (1000 words) Lab Report

Central Processing Time and Its Performance

This paper 'Central Processing Time and Its Performance" focuses on the fact that the key concept of carrying out this lab experiment is to determine the performance time of information for the 3 tasks to be identified in the methods and techniques used to accomplish the experiment....
1 Pages (250 words) Lab Report

Analysis of Wastwater

ODThe following table summarizes results from the lab.... Your concern… elates to updating your wastewater analysis laboratory in order to determine whether to equip the laboratory with Biochemical Oxygen Demand (BOD) only, Chemical Oxygen Demand (COD) only, or both of the analysis strategies and the report focuses on results from both techniques to Dear client Re: Analysis of wastewater Thanks for the trust that you have on my competence in resolving your concern....
2 Pages (500 words) Lab Report

The Kinetics of a Diffusion-Controlled Reaction

hellip; For reactions occurring in solutions, the solvent exerts an effect as a consequence of it being a condensed phase, with its molecules very close together even in case of a chemically inert medium (Arnaut, Formosinho and Burrows 225). In fluorescence quenching, a reaction takes lab Report 18 March The Kinetics of a Diffusion-Controlled Reaction Objective: To determine the rate constant and diffusion diameter of a diffusion-controlled reaction using the technique of fluorescence quenching....
2 Pages (500 words) Lab Report

Immunological Techniques Lab Assignment

Compare and contrast the three techniques for the types of information determined about the antibody-antigen systems studied.... We obtain arcs of precipitin showing the existence of Ag-Ab reactions.... Between whole serum and anti-whole serum we obtain more arcs showing more cross linking....
2 Pages (500 words) Lab Report

Plastics Testing and Failure Analysis

This lab report "Plastics Testing and Failure Analysis" presents the obtained values and the observations made to the literal values using the plastic and elastomers identification chart provided the unknown samples were identified and summarized in the table below.... he lab session aimed at characterizing, testing, and identifying various plastics given that plastic properties are considerably different and are dependent on various factors like composition, thermal history, chemical structure, and manufacturing condition....
5 Pages (1250 words) Lab Report

Electrophoresis: The Main Technique for Molecular Separation

One dimensional The paper "Electrophoresis: The Main Technique for Molecular Separation" is an outstanding example of a lab report on formal science and physical science.... The tubes are used for easy one dimensional separations (nearly anyone can make their own apparatus from inexpensive materials found in any lab), while the sheets have a larger surface area and are better for two- dimensional separations....
2 Pages (500 words) Lab Report
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Contact Us