Question

keporT For any equations that are written, label each equation so that it is clear which observation it represents. 1. Define the term Lewis base and give rwo examples. Are your examples possible ligands Why 2. Provide a table for the observations recorded in Part 1. If a colo or why not? r change was observed after adding HCl or water, provide a balanced chemical equation showing the reaction that occurred. 3. For Pa rt 2, create a table showing your observations for each of the 5 test tubes in Part 2 a, b and c before and after addition of NaOH. If a color change was observed, provide a balanced chemical equation showing the reaction that occurred. For Parts 3 & 4, create a table showing observations that occurred for each step. Do your observations from Part 3 &4 give any indication about the amphoteric nature of the compounds formed in this section? Why or why not? Does ammonia or NaOH providea more conclusive demonstration of amphoterism? Explain. Which of the ions that you studied were amphoteric? Write the equations showing their amphoteric behavior. In each case, explain how you determined that a cation was amphoteric. For Part 5, create a separation scheme (according to the directions provided by your TA during recitation) that shows how you will separate the 4 potential cations. Report which two cations were contained in your unknown. 4. 5. 6. Provide a short paragraph explaining how you identified your ions. Include photos from each step of your separation scheme and your "known" ion scheme. 7.

Answer 1

Water and ammonia has lone pair of electrons and by furnishing or donating this to electron deficient species it acts as Lewis base

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