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Removing Iron from the Mixture, Separating the Salt and Sand, Recovering…
Removing Iron from the Mixture
Record mass of completely dry 50 mL beaker and watch glass
Obtain Fe, NaCl, SiO2 mixture and record its ID number. Add the sample into the 50 mL beaker and record the mass
Hold a small magnet under the beaker and roll and tap the particles into the second beaker
When all the particles are loose move the particles to the watch glass and use mass difference to record the mass of the iron fillings
Discard the fillings appropriately and properly clean the rest of the materials
Separating the Salt and Sand
Clean all glassware and plastic funnel
Pour 10 mL of deionized water into the beaker with the remaining mixture and stir for 2 minutes
Record a filter paper's mass and collect filtrate in a beaker
Fold filter paper into quarters and rip off one corner
Put a few drops of DI water on the filter paper and pat it into the full
Decant 2/3 of the mixed solution into the funnel and gently swirl the solution and quickly pour the remaining particulate into the center of the funnel
Precisely transfer the residue into the funnel
Keep the solid sand in the funnel and the filtrate into the beaker
Recovering the sand
Clean and dry an evaporating dish then record its mass
Plug in a hotplate and keep the cords in place
Unfold the filter paper and spread the sand particulate on the paper.
Drape the filter on the evaporating dish and put it on the hotplate
When the sand and filter paper are fully dried put the dish to a paper towel or wire gauze and let it cool
When it has cooled measure its mass on the evaporating dish and record the mass
Clean up/Waste Disposal
Wash, dry and store the glassware and dispose of the individual components
Data Analysis
Find the percent by mass in the unknown mixture and record
Use the total mass to determine the percent recovery