5 test each 3 solid samples by cautiously adding 10

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5. Test each 3 solid samples by cautiously adding 10 drops of HCl to each test tube. Observe the behavior of each sample while the acid is being added. 6. Record in Table 5.3 the behavior of each solid sample as the acid was added.. 7. After the heating of beaker completed, allow the beaker and watch glass to cool for a minimum of 10 minutes. 8. When cooling is completed, carefully remove the watch glass from the beaker and use your spatula to scrape most of the sublimed solid from the watch glass onto a clean piece of filter paper. Transfer the collected solid to a dry, small test tube and test it by the method described in step 5. Record in Table 5.3. C. Solubility 1. Use a weighing dish and centigram balance to weigh out approximately 0.5 g of a mixture that contains white solid CaCO 3 and blue solid CuSO 4 .
2. Put the sample into a 50 mL beaker and use a graduated cylinder to add about 10 mL of distilled water. Swirl to mix the materials, then set the beaker aside while you go step 3. 3. Fold a filter paper twice and open it into a cone as illustrated. Place the filter paper into a funnel that is mounted on a ringstand. 4. Moisten the filter paper in the funnel with a little distilled water from your wash bottle. Swirl the beaker (step 2) again to suspend the solid, then quickly pour the contents into the center of the filter paper in the funnel. Collect the liquid that passes through the filter paper in a clean 100 mL beaker. 5. While the filtrate is draining from the funnel, take 3 pieces of filter paper to the reagent area and use your spatula to obtain small individual sample of CaCO 3 , CuSO 4 , and the mixture that contain 2 solids. (should cover about 10-cent coin, not too large) 6. Return to your work area and divide each solid sample into 2 approximately equal smaller samples. Put each of the smaller samples into separate small (10 cm) test tubes. Add 3 drops of HCl to one sample of each solid. Record your observations in Table 5.5. To remaining sample of each solid, add 10 drops of distilled water. Add 5 drops of concentrated aqueous ammonia (NH 3 or NH 4 OH), and agitate the test tube to mix the contents. Record your observation in Table 5.5.
7. Put 10 drops of the filtrate collected in step 4 into a small test tube and add 4 drops of NH 3 or NH 4 OH. Mix the test tube contents and record in Table 5.5. 8. Empty the beaker that contains the filtrate into the proper container and rinse the beaker well with tap water followed by distilled water. 9. Put the clean 100 mL beaker back under the funnel. And wash the solid in the funnel by adding 10 mL distilled water and letting the funnel drain. 10. Use your spatula to remove moist solid from the funnel. Use 5 drops of distilled water to wash solid from spatula into 10 cm test tube. Test the sample in the test tube by adding 3 drops of HCl and agitating the mixture. Record your observation in Table 5.5.

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