BEST TECHNIQUE TO REMOVE MIXTURE FROM THE RIVERBED OF ELK RIVER
Sledjeski, Asmar, Garcia
Title of Project: Separation of Mixtures by Filtration and Evaporation
Research Question: How do we use gravity and suction filtration and evaporation to separate the different compounds in the mixture that were spilled onto the riverbed?
Materials list:
• Balance
• Watch glass
• Oven
• Filter paper
• Suction filtration apparatus
• Spill mixture, 10g
• Ring stand and clamp
• Hot plate
• 600ml beaker
• 400 ml beaker
• Buchner funnel
• Side arm flask
• DI water
• Stirring rod
• 250 ml beaker
• Erlernmeyer flask
• Isopropyl alchohol
• Funnel
Safety:
Benzoic Acid: hazardous in case of ski contact
Copper Sulfate: Irritant to eyes and skin
Calcium Carbonate: do not consume, avoid eye contact
Sand: do not consume
Isopropyl alcohol: Irritant to skin and eyes
Wear apron and goggles to lab.

The step-by-step procedures of the scenario lab as followed:
1) Measure out 5 g of the mixture
2) Add 50 mL DI water to mixture in 250 mL beaker
3) Weigh filter paper and watch glass.
4) Place filter paper in a Buchner funnel and wet it with deionized water.
5) Filter the mixture slowly until all the mixture has been added.
6) Break the suction and remove the filter paper with the residue.
7) Place the filter paper in the watch glass and into the oven for 15-30 minutes.
8) Afterwards, take out the watch glass and filter paper, and allow it to cool.
9) Add the residue to the beaker with alcohol and stir it for 5 minutes.
10) Use gravity filtration to separate the sand and alcohol, leaving only the CaCO3 in the alcohol
11) Move the solution from the side arm flask to a 250ml beaker.
12) Place the beaker on a hot plate; gently heat and observe changes.
13) Weigh the filter paper and watch glass.
14) Use gravity filtration to separate the mixture of Benzoic