The NaCl was separated from the SiO2 because of the solubility of NaCl in water and the insolubility of SiO2 in water. Next, extraction was observed in separation of the water insoluble solid. ![]() The original weight of the naphthalene collected was. First, the sublimation of naphthalene was done by heating the mixture. Thus, each certain digit plus one uncertain digit was included in all measurements. When measuring the different amounts of the three components of the mixture, all measurements were based on significant figures. In this lab certain separation techniques were used and learned. Calculate the weight of the recovered sand by subtraction. Weigh the beaker and the sand to the nearest. Allow the sand to cool to room temperature.Ĥ. When dried, the sand should be freely flowing. Place beaker 3 with the sea sand on the wire gauze with an iron ring and ring stand and heat the sand to dryness. Weigh a third dry 150-mL beaker and transfer the sand from the filter paper to beaker 3. Calculate the weight of the recovered NaCl by subtraction.ġ. Weigh the beaker, stones, and the solid residue to the nearest. When the liquid is fully evaporated, allow the beaker to cool down. As the volume of liquid is reduced, sodium chloride will appear. Place beaker 2 on the wire gauze with an iron ring and ring stand and heat using the Bunsen burner. Rinse beaker 1 with 5-10-mL of water, pour over the residue in the funnel and add the liquid to the filtrate. Position beaker 2 under the funnel and pour the mixture through the filter, first decanting most of the liquid into beaker 2 and then transferring the wet solid into the funnel. Wet the filter paper with water and adjust the paper so that it lies flat on the glass of the funnel. Fold a piece of filter paper according to the technique in Figure 3.5. Assemble the apparatus for gravity filtration as shown in Figure 3.4 4. ![]() 001g and record its mass onto the data sheet. Weigh a second clean, dry 150-mL beaker with 2 or 3 boiling stones to nearest. Add 25mL of distilled water to the solid in the beaker. Separation of the Water Insoluble Solidġ. Record the weight of the naphthalene sublimed by subtracting the weight of the beaker with remaining solid after sublimation from the weight of beaker 1 with original mixture.Ĭ. Allow the beaker to cool and then weigh the beaker with the contained solid. Weigh all the naphthalene collected and record it on the Report sheet to the nearest. Continue heating and scraping off solid until no more solid collects. Return the evaporating disk to the beaker and apply the heat again. Stir the contents of the beaker with a glass rod. After 10 minutes, remove the Bunsen burner from under the beaker and then remove the evaporating disk from the beaker and collect the solid by scrapping it off the dish with a spatula onto a weighing paper. A solid should collect on the underside of the evaporating dish. Carefully heat the beaker with a Bunsen burner until vapors appear in the beaker. Place an evaporating dish with some ice on top of the beaker containing the mixture and place the beaker on a wire gauze with an iron ring and ring stand assembly. Set up and do the sublimation in the hood.Ģ. 001g and calculate the exact weight of the mixture by subtraction.ġ. Record the weight of the beaker with the mixture inside to nearest. Obtain a sample of the mixture from your instructor and carefully transfer 2g of the mixture into the beaker. Obtain a clean, dry 150-mL beaker and weigh it to the nearest. % component= grams of component isolatedġ. To determine the percentage of each component in the mixture, this formula can be used. Salt with water to extract and evaporating water to recover dry NaCl and sand. The separation of this mixture involves three steps which are heating the mixture to sublime the naphthalene, then dissolving the table ![]() ![]() The mixtures that will be separated are naphthalene, common table salt, and sea sand. 5) Evaporation: involves the process of heating a mixture in order to separate a volatile liquid in the form of a vapor, while the remaining component dry.
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