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3 pages/≈825 words
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Subject:
Life Sciences
Type:
Lab Report
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English (U.S.)
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Topic:

Separating a mixture of NaCl, and NH4Cl

Lab Report Instructions:

To the writer.
attach is all the information that you need and here is the link for a video ... https://youtu(dot)be/iWhwLWQToN8
Video instructions on how to complete this lab. Make sure that you watch this video.
let me know if you need any more information.
And also a copy os my last lab for you to have an idea.
Thanks.
PS: a note from my professor... This assignment will be auto-checked for plagiarism. If a student's paper is found to have violated JCC's Academic Code of Conduct, then the student will receive a grade of zero for the assignment and will be reported to student services.


Lab: Separation of a Mixture


 


OBJECTIVE: To use critical thinking to determine an efficient method of separating a mixture of sand and two salts so that the percent composition of each component can be calculated.


 


INTRODUCTION: Mixtures can be separated on the basis of the differences in physical properties of the components. If this is done in a quantitative fashion, the percent composition of the mixture can be determined. This is useful in order to determine that the mixture contains the components in the right amount as indicated (i.e. you get what you pay for). In this experiment you will separate the components of a mixture and calculate the mass percent of each component. The mixture is composed of sand, sodium chloride, and ammonium chloride. Both sodium chloride and ammonium chloride are water soluble. A unique property of ammonium chloride which may be useful is that is sublimes at high temperature- that is, heat the dry solid it and it will vaporize straight into the gas phase without melting first.


 


SAFETY NOTE: Ammonium chloride vapor is a respiratory irritant. Complete the experiment in an area with good ventilation- preferably outside or near an open window.


 


EQUIPMENT:  Prepared mixture (~4 grams), weighing boat, burner, ring stand, glass beaker, Tongs, Filter paper, Funnel, Erlenmeyer flask, stirring rod. May require additional materials depending on the procedure that you devise.


 


PROCEDURE: Obtain approximately a 2g sample of the mixture. Determine its exact mass. Devise a strategy to separate the mixture based on the physical properties of the components. Write the procedure down in detail so that it may be used to write a lab report. Determine the mass of each component. It is not necessary to have each of the three components present at the end of the experiment, as long as their masses can be calculated.


 


Do procedure in duplicate so that results from the two trials may be compared.


 


DATA:  Record all data from the experiment in a table, including units. Record any observations made during the experiment.


 


CONCLUSION: Calculate the percent of each component in the mixture


 


%component= mass of component/ mass of mixture x 100


 


Determine the average % of each component from the duplicate analysis. SHOW ALL WORK.


 


Discuss in your conclusion what can be concluded from your data and observations.


Submit the above in a laboratory report showing your objective (in your own words, do not copy the handout!), equipment, procedure, data, conclusions, and post-lab questions.


 


POST-LAB QUESTIONS


 



  1. What are two possible sources of error in your experiment? Be specific.

  2. What may be a reason for any possible variance in the data between the two trials?

Lab Report Sample Content Preview:

Separation of a Mixture Lab
Date of experiment
Student name, lab partner(s
Class course
Section number
Objective:
Separating a mixture of sand sodium chloride, (NaCl), and ammonium chloride (NH4Cl) to determine the percent composition of each component can be calculated.
Procedure:
Materials
~4 grams of the mixture (Sodium chloride (NaCl) or salt, Ammonium chloride (NH4Cl) and sand mixture
Weighing boat
Burner
Ring stand
Glass beaker
Tongs
Filter paper
Funnel
Erlenmeyer flask
Stirring rod
Beaker
Water
NH 4 Cl 0.6g
NaCl0.4g
Sand 1.0 g
* Obtain approximately a 2g sample of the mixture
* Dissolution in distilled water of sodium chloride contained in the sample forming 2 phases: sand and water solution with ammonium and sodium chloride.
* Place the 2 grams mixture in the glass beaker and add 20 ml water then start stirring using the stir rod
* Pour the solution into the Erlenmeyer flask and leave the sand in the beaker after filtration
* Wash the sand and pour the water to the Erlenmeyer flask
* Label sedimentation of the sand.
* System filtration:
* Decantation of the liquid
* Crystallization of sodium chloride by evaporation of water, and heating results the Erlenmeyer flask placed on the ring stand and burner, and then the ammonium chloride results in sublimation
* Calcination of the filter paper and drying of the sand
* Weigh the components and compare with what was in the original mixture.
Filtration and separation of the mixture, results in the sand being separate from the ammonium chloride and sodium chloride water solution. Both ammonium chloride and sodium chloride dissolve in water and considering the differences in the physical properties of the components of the mixture, the sand is separated when the mixture passes through the filter paper.
The water that moistens the sand when filtering still contains dissolved sodium chloride. The objective of cake washing is to eliminate that remnant of sodium chloride and ammonium chloride by adding distilled water that gradually decreases the concentration of sodium chloride in the water that moistens the sand, until the ammonium and sodium chloride become zero
Through the process of calcination the filter paper and drying the sand, using the water-free sand is obtained. To obtain sodium chloride, it is enough to evaporate all the water in the solution. All sodium chloride will crystallize at the bottom of th...
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