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EXPERIMENT 2: Separation of the Components of a Mixture Name: ID: Section: Due date: Instructor: Pre-Lab Questions 1. Dr
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EXPERIMENT 2: Separation of the Components of a Mixture Name: ID: Section: Due date: Instructor: Pre-Lab
Questions 1. Draw a pie chart showing the percent composition of the mixture. Label the wedges. 2. Think about the lab procedure and what you know about types of mixtures. a. Name one heterogeneous mixture present in this lab. b. Name one homogeneous mixture present in this lab. c. Name one pure substance present in this lab. 4. From an 11.1-g sample containing sodium chloride, ammonium chloride, and sand, the following components were recovered: 3.64-g sodium chloride, 1.56-g ammonium chloride, and 5.92-g sand. Calculate the percentage of each substance in the sample. 5. Classify each of the following as a pure substance or a mixture; if a mixture, state whether it is heterogeneous or homogeneous: a. concrete, b. tomato juice, c. marble, d. sea water, e. Iron 6. What distinguishes a mixture from an impure substance?
7. Why should one never weigh a hot object? 8. How do decantation and filtration differ? Which should be faster? 9. Define the process of sublimation. 10. Explain the Law of Conservation of Matter.