Name:_____________________________________________
Date:_________________
Title: Lab Demo: Pure Substance vs. Mixture
Partner/Group _____________________________
Purpose: _____________________________________________________________________________________
Materials:
Apparatus: Beakers, test tubes and rack, magnet, bunsen burner, test tube holder
Samples of salt, sand, iron filings, powdered sulfur, sugar cubes, water and ethanol (alcohol)
Safety: _______________________________________________________________________________________
Procedure: Pictorial Flow Chart
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1. Mixture of salt, sand and iron filings, powdered sulfur.
2. Mixture of alcohol and water
3. Device a plan on how to separate the solid mixture and liquid mixture.
Activities
Activity A
Mixture of Solid:
a) salt and sand
b) Iron Filings and Powdered
Sulfur
Burning the mixture of iron and
sulfur.
Activity B
Mixture of Liquid:
 10 mL samples of water
 10 mL aalcohol in separate
test tubes.
Some Questions to think about.
1. How would you separate the solid mixture of salt and sand? Iron
filings and powered sulfur?
1.
List the characteristic properties of water and alcohol:
Properties
appearance
odor
flammability
density
melting point
boiling point
Water
Alcohol
2.
What would be the density of 50-50 alcohol and water?
3.
How would you know if the mixture has more water?
Activity C
Solubility of Solvent
Add sugar cube into the mixture of
water and alcohol
Describe the solubility of water vs. alcohol as a solvent.
Activity D
Separation of alcohol and water
(Fractional Distillation)
Device a plan how would you separate 50-50 alcohol water.
Data and Observation: Create a table to organize your observations.
Analysis: Use your observation to analyze the result of the separation of mixture.
Conclusions: Use the rubric to answer the questions