Part 1: Tony has been monitoring wildlife around a stream near the Delaware Tech campus for an ongoing Biology proj...
Part 1: Tony has been monitoring wildlife around a stream near the Delaware Tech campus for an ongoing Biology project. During his last visit to the stream he noticed that there were rusty-red deposits on a number of the rocks. When he scooped up some of the water he saw that it appeared to be cloudy and had a yellowish tint. He thought it smelled slightly metallic. However, he did not observe any signs that wildlife had been harmed At lunchtime, Tony mentioned what he had observed at the stream to his friend, Jill, who is studying chemistry at Delaware Tech. He wondered if she could explain the water's color and cloudiness. Jill thought for a while, and then said that she did know that natural water usually contains traces of many different substances, most of which do not affect its color. Some are inorganic compounds that the water picks up as it filters through the ground, but there will be some organic compounds too. She thought that the metallic smell could suggest an inorganic compound. In her experience most of those compounds are ionic, like salt, and won't discolor water or stain rocks. She tried to think of colored materials she had encountered and remembered using blue crystals of CuSO4 5 H2O in lab. She'd also worked with solutions containing copper and they were usually blue or green. She recalled using red, orange, purple, and yellow solutions but couldn't remember the compounds involved or any metals in those compounds. She did remember that metals that produce colored solutions are primarily found in a particular area of the Periodic Table. Each team member should record preliminary responses to questions 1-4 in their individual notebooks. Answer question 5 in ONE team member's lab notebook. Turn in all yellow sheets with the lab report. 1. What area or areas of the Periodic Table will you focus on considering what Jill has. remembered? 2. List five elements whose ions might produce color in the water. Indicate cations and/or anions containing those elements that occur in ionic compounds. 3. Are any of the cations or anions from step 2 associated with particular colors in aqueous solution? Use the Internet to look up this information and note the associated colors in your notebook. Record web site URLs indicating where the information was obtained. 4. Based on what you found in step 3, does the color of an aqueous solution depend more frequently on the cation or the anion that is in a solution? 5. Share the information you found with your team members. Summarize everyone's information in ONLY one Team member's notebook. Choose three elements that could