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SEPARATION OF A MIXTURE OF SAND AND SALT

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Mallory Milroy

on 4 December 2014

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Transcript of SEPARATION OF A MIXTURE OF SAND AND SALT

Separation of a Mixture of Sand & Salt
By: Mallory Milroy
Procedure
5.) Stir in the 5g of combined sand/salt mixture to the 50-mL of distilled water.
6.) Determine the combined mass of a watch glass & a piece of filter paper. Record this mass.
7.) Set up Büchner Funnel Apparatus.
Procedure
1.) Obtain a sample of 4 grams of sand--Record exact mass.
2.) Obtain 1 gram of one of the four salts (NaCl, CaCl2, KCl2, KClO3)--Record exact mass.
3.) Determine the mass of a 400-mL beaker.
4.) Measure out 50-mL of distilled water & add to the 400-mL beaker.
Introduction
Objective
In this experiment I separated the components of a mixture of sand and salt to determine what percentage of each mixture contained.
Materials
• Most of the materials we encounter in everyday life are not pure substances.
• Materials such as cement, wood, soil, and ink are formed from physical combination of various substances, and are called mixtures. Mixtures can be classified into homogeneous (uniform) and heterogeneous (non-uniform).
• Mixtures are characterized by two fundamental properties: #1- each of the substances in the mixture retains its properties; #2- mixtures can be separated into their components by differences in their physical properties.
• Filter Paper
• Watch Glass
• Sand
• Hot Plate
• 400 mL Beaker
• Sodium Chloride
• Calcium Chloride
• Potassium Chloride
• Potassium Chlorate
• Distilled Water
• Graduated Cylinder
• Büchner Funnel Apparatus
Procedure
8.) Filter the mixture by adding the liquid slowly into the center of the funnel. The liquid filtered through will be collected in the Erlenmeyer flask.

9.) After all the liquid has been filtered, use two 5 mL portions of water to transfer any sand
remaining in the beaker to the filter paper.

10.) After all the water has dripped from the end of the funnel, carefully remove the filter paper from the funnel (without tearing it) and place on the watch glass and set in the oven for 10 minutes at 110°.

11.) When the is dried after 10 minutes, determine the mass of the watch glass, filter paper and sand, and record.

Procedure
12.) Pour the liquid from the
Erlenmeyer flask into the 400-mL
beaker.

13.) Place the 400-mL beaker onto the hot plate until all of the water has evaporated and you are left with salt.

14.) After the beaker has cooled to the touch, determine its mass with the salt, and record.

15.) Run this entire experiment once more.
Calculations::
1. Calculate the percent sand in the mixture, using this equation:
% sand in mixture = Mass of sand/Mass of sample X 100
2. Calculate the percent salt in the mixture, using this equation:
% salt in mixture = Mass of salt/ Mass of sample X 100
3. Calculate the Percent Recovery, using this equation:
% Recovery = Total mass of sample recovered/ Mass of sample X 100
Results
Results:
Post-Experiment
Calculations:
NaCl:

3.8+1.12= 4.92
4.92/5.00= 98.8%
1.12/4.92= 22.7%

CaCl2:

3.87+0.88= 4.72
4.72/5.00= 94.4%
.88/4.72= 18.6%




KCl:

3.72+ 1.34= 5.06
5.06/5.00=100.12%
1.34/5.06= 26.5%

KClO3:

3.79+ 1.05= 4.84
4.84/5.00= 96.8%
1.05/4.84= 21.7%
According to my data the sum of the percent salt and sand doesn't equal exactly 100% (5.00g). The percentage doesn't equal 100% beause there was an error in the experiement which resulted in an additional, or negative gram(s) of matter.
Errors/Conclusions
Thank You!!
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