Analyze Data Calculate the mass of the ribbon and the product. Wash out the crucible with Mass Data Material (s) Mass (g) Empty crucible 24.92 Crucible and Mg ribbon before heating 25.40 Magnesium ribbon 0.50 Crucible and magnesium 25.50 products after heating Magnesium products 0.10 Analyze and Conclude 1. Cleanup and Disposal Dispose of the product as directed by your teacher. Check the mixture with a conductivity tester. Add 10 mL of distilled water to the beaker, and stir. Place the dry, solid product in the beaker. Allow it to cool, and measure the mass of the magnesium product and the crucible. Turn off the burner as soon as the magnesium ignites and begins to burn with a bright white light. Place the crucible on the triangle, and heat it with a hot flame (flame tip should be near the crucible). Measure the mass of the magnesium and crucible together. Roll 25 cm of magnesium ribbon into a loose ball. Return all lab equipment to its proper place. Measure the mass of the clean, dry crucible. Chemistry: Matter and Change 2 ChemLab Worksheets Name_ Date_ ChemLAB 7 (continued) 4. Position the ring on the ring stand about 7 cm above the top of the Bunsen burner. Record all measurements in your data table. The mass of the magnesium products is calculated by subtracting the mass of the crucible from the mass of the crucible and its contents after heating._ _ _ _ _ _ _ _ Procedure 1. _ The mass of magnesium ribbon is calculated by subtracting the mass of the crucible from the mass of the crucible and magnesium. Explain what must be done to calculate each mass value that is not measured directly. Other mass values are measured directly._ _ _ _ _ _ _ _ _ 6. In your data table, which mass values will be measured directly? Which mass values will be calculated? _ The mass of the magnesium and the mass of the magnesium products are calculated. O2– 1s22s22p6, N3– 1s22s22p6 Both have the configuration of neon. 1 ChemLab Worksheets Name_ Date_ ChemLAB 7 (continued) _ O 1s22s22p4, N 1s22s22p3_ _ Both will gain electrons. Repeat question 2 for oxygen and nitrogen. Based on this configuration, will magnesium lose or gain electrons to become a magnesium ion? _ lose electrons _ Chemistry: Matter and Change 3. The magnesium ion has an electron configuration like that of which noble gas? _neon_ _ a. Write the electron configuration of the magnesium atom. Write the electron configuration of the magnesium ion. List any conditions that must be kept constant. Avoid handling heated materials until they have cooled. The intensity of the light can damage your eyes. Do not look directly at the burning magnesium. crucible tongs centigram balance 100-mL beaker distilled water conductivity tester Safety Precautions Always wear safety glasses and a lab apron. Classify the products as ionic or not ionic. Acquire and analyze information that will enable you to decide if a compound has an ionic bond. Problem Can the physical properties of a compound indicate that they have ionic bonds? Objectives Materials magnesium ribbon (25 cm) crucible ring stand and ring clay triangle Bunsen burner stirring rod Observe evidence of a chemical reaction. You will decide if the products you formed are ionic compounds. Ionic compounds have properties that are different from those of other compounds. You will test the compounds to determine several of their properties. In this investigation, you will react elements to form two compounds. If energy is released as the compound is formed, the resulting product is more stable than the reacting elements. Name_ CHAPTER 7 Date_ Class_ ChemLAB Synthesize an Ionic Compound Elements combine to form compounds.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |