Lab#3 Separation of a Mixture of Solids

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Topics: Water, Mass, Weight
Title:
Lab #3 Separation of a Mixture of Solids
Purpose:
To understand the different separation methods and techniques that depend on the chemical properties of a specific substance. Also to become more comfortable with performing those actions of separation so I have them in the future. For this experiment, I will separate a mixture of four distinct substances: sodium chloride, benzoic acid, silicon dioxide, and iron fillings into pure beings.
Procedure:
Materials:

distilled water coffee cups (2) plastic wrap sheet of paper(2) small saucer paper towels crushed ice
100mL beaker, glass
Burner – fuel
Burner-stand
Cylinder, 25mL
Funnel
Goggles
Digital scale
Magnet bar
Stirring rod
Filter paper
Mixture of solids(salt, sand, benzoic acid, iron fillings)
Plastic weighing boat

Procedure:
1. Separating out the Iron – this method uses irons property of being magnetic to single it out from the other substances which do not respond to a magnet.
a) Use scale to find the mass of your weighing boat. Then pour the mixture of solids into the boat and weigh it again. Then find the net mass of the mixture by taking the weight of the weighing boat and mixture and subtracting the mass of just the weighing boat.
b) Spread mixture into a thin layer on a sheet of paper. Cut the second piece of paper into a 10-cm square, weigh and record its mass.
c) Cut the plastic into a small square t fit around the magnet. Wrap plastic over the magnet. Then pass magnet closely over the surface of the mixture. Repeat several times, and then hold magnet over the square of paper, carefully remove plastic to let iron fall to the paper. Weigh it and determine the net mass of the iron fillings.
2. Separating out the Sand – this method involves dissolving all soluble remaining substances so the only thing left is sand since it does not dissolve into water.
a) Put the remaining mixture into the beaker and 50mL of water. Set up beaker stand and fuel, and heat beaker

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