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Separation of Mixtures Lab

Separation of Mixtures Lab - Ryan O'Hearn Chemical...

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Ryan O’Hearn Chemical Principles I Lab - 1011.205.51 Separation of Components of a Mixture 08:10:07 Purpose To gain an understanding of how chemical mixtures can be separated based on components properties. This lab will consist of a 3-part separation of silicon dioxide (SiO 2 ), calcium carbonate (CaCO 3 ), and potassium chloride (KCl). We will learn how to measure each component that is in a mixture, called quantitative analysis. In order to do this we will separate silicon dioxide (sand), calcium carbonate (chalk), and potassium chloride (salt substitute), and measuring the mass of each as we progress. Certain parts of this mixture are soluble in water, in acid, and in neither. Knowing this we can effectively separate each component individually in order to find its quantity. A figure is included, which shows the basic procedure of this lab. Procedure See “Experiment 3: Separation of Components of a Mixture”, Chemistry 205 Lab Part D Procedure: 1. Weight vial with contents and cap and record mass in grams. 2. Then empty contents of vial into 150mL beaker and weight vial and cap empty. 3. The mass of unknown contents equals the mass of the vial full minus the vial empty. Record this mass in grams for use later. 4. Weight 55mm filter paper and record mass in grams. 5. Obtain around 40mL of 3M-HCl (Hydrochloric Acid) in a clean, dry, small beaker. 6. Slowly pour HCl into the 150mL beaker with unknown, swirl, and record your observations. 7. Once the chemical reaction has subsided and all KCl and CaCO 3 has dissolved, pour contents on beaker into Buchner funnel and filter in order to catch the silicon dioxide. Since the SiO 2 will have sunk to the bottom, keeping the beaker tipped over the Buchner funnel, using distilled water in a squirt bottle, and spray out the remaining SiO 2 into the filter. 1
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8. Using boiling water in a beaker on a hot plate and a small watch glass, carefully remove filter paper after most water has been sucked through and place it onto the watch plate in order to dry the remaining silicon dioxide. 9. Once water has evaporated, weigh the filter paper and the dry SiO 2 and record mass.
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Separation of Mixtures Lab - Ryan O'Hearn Chemical...

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