Lab 2 Separation of a Mixture of Solids

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Title: Separation of a Mixture of Solids

Purpose: Learn and demonstrate how to separate different ingredients from a mixture of solids using different methods based on the properties of each ingredient.

Procedure: I weighed mixture and tools, and proceeded to begin separating each ingredient. I used a magnet to separate the iron from the mixture. Then I heated the mixture in water to get the non-soluble sand out. Then I filtered out the benzoic acid after cooling it into a crystal form. Lastly, I allowed the water to evaporate leaving behind only the salt. If any party was interested water does not evaporate fast enough for my liking. Data:

SEPARATING IRON
SUBSTANCE/ITEMMASSOBSERVATIONS
WEIGHING DISH.6 G
MIXTURE + WEIGHING DISH5.1 G
NET. MASS OF MIXTURE4.5 G
10 CM SQUARE OF PAPER.9 G
IRON FILINGS ON PAPER2.1 G
NET MASS OF FILINGS1.2 G

SEPARATING SAND
SUBSTANCE/ITEMMASSOBSERVATIONS
WEIGHING DISH.6 G
SAND + WEIGHING DISH1.7 G
NET. MASS OF SAND1.1 G

SEPARATING BENZOIC ACID
SUBSTANCE/ITEMMASSOBSERVATIONS
PAPER CUP10.3 G
FILTER PAPER1 G
BENZOIC ACID CRYSTALS + FILTER PAPER1.5 G
NET. MASS OF BENZOIC ACID CRYSTALS.5 GI HAVE A LITTLE LEFTOVER BENZOIC ACID AT THE BOTTOM OF THE CUP THAT I COULDN’T GET TO POUR OUT, AND A FEW CRYSTALS LEFT IN WATER AFTER FINISHED WITH THIS STEP THAT APPEARED LATER WHILE EVAPORATING.

SEPARATING TABLE SALT
SUBSTANCE/ITEMMASSOBSERVATIONS
PAPER CUP10.3 G
SALT CRYSTALS + PAPER CUP11.4MAY HAVE BEEN SOME ACID CRYSTALS STILL AT SURFACE OF WATER NET. MASS OF SALT CRYSTALS1.1

Overall Results
SubstanceMassPercentage
Iron Filings1.2 g26.67 %
Sand1.1 g24.44%
Benzoic Acid.5 g11.11%
Table Salt1.124.44%
Whole Mixture4.5100.00%
Unaccounted/Marginal error.613.33%

Questions:

A. I thought it was rather obvious to use the magnet for the iron filings, but really did not have an educated guess for how to separate the rest.

B....
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