{"id":589,"date":"2025-08-12T15:02:32","date_gmt":"2025-08-12T15:02:32","guid":{"rendered":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/?post_type=chapter&p=589"},"modified":"2026-03-28T12:07:37","modified_gmt":"2026-03-28T12:07:37","slug":"post-lab-questions-7","status":"web-only","type":"chapter","link":"https:\/\/pressbooks.hccfl.edu\/introchemlabmanual\/chapter\/post-lab-questions-7\/","title":{"raw":"Post-Lab Questions","rendered":"Post-Lab Questions"},"content":{"raw":"

Directions:<\/h2>\r\nAnswer the following questions, show work for all calculations. Work must be shown to receive credit for calculations. All questions are weighted equally.\r\n
    \r\n \t
  1. Based on your recorded observations, which cation(s) were present in your unknown solution? Provide your unknown number and a clear explanation of how your results match the known reaction patterns.<\/li>\r\n \t
  2. Were any of your unknown\u2019s results ambiguous or unexpected? If yes, which reagent produced them and how did you resolve the uncertainty?<\/li>\r\n \t
  3. A solution is tested with Na\u2082SO\u2084 and produces no ppt, but when tested with Na\u2083PO\u2084, it forms a white ppt. Based on the solubility rules and your lab experience, which cation is most likely present? Explain.<\/li>\r\n \t
  4. Describe one procedural error that could lead to false positive precipitate formation in a well. How could you avoid it?<\/li>\r\n \t
  5. \r\n
    \r\n
    If you were given an unknown solution and told it contained either Ag+<\/sup>, Na+<\/sup>, or Pb2+<\/sup>, describe a step by step procedure you would use to identify which ion is present based on solubility rules.<\/div>\r\n
    <\/div>\r\n<\/div><\/li>\r\n<\/ol>\r\n
    \r\n

    Licenses and Attribution<\/strong><\/h3>\r\n

    CC Licensed Content, Original<\/h4>\r\nThis educational material includes AI-generated content from ChatGPT by OpenAI. The original content created by Carol Stallworth from Hillsborough Community College is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0<\/a>).<\/span>\r\n\r\nAll images in this textbook generated with DALL-E are licensed under the terms provided by OpenAI, allowing for their free use, modification, and distribution with appropriate attribution.\r\n\r\n<\/div>\r\n ","rendered":"

    Directions:<\/h2>\n

    Answer the following questions, show work for all calculations. Work must be shown to receive credit for calculations. All questions are weighted equally.<\/p>\n

      \n
    1. Based on your recorded observations, which cation(s) were present in your unknown solution? Provide your unknown number and a clear explanation of how your results match the known reaction patterns.<\/li>\n
    2. Were any of your unknown\u2019s results ambiguous or unexpected? If yes, which reagent produced them and how did you resolve the uncertainty?<\/li>\n
    3. A solution is tested with Na\u2082SO\u2084 and produces no ppt, but when tested with Na\u2083PO\u2084, it forms a white ppt. Based on the solubility rules and your lab experience, which cation is most likely present? Explain.<\/li>\n
    4. Describe one procedural error that could lead to false positive precipitate formation in a well. How could you avoid it?<\/li>\n
    5. \n
      \n
      If you were given an unknown solution and told it contained either Ag+<\/sup>, Na+<\/sup>, or Pb2+<\/sup>, describe a step by step procedure you would use to identify which ion is present based on solubility rules.<\/div>\n
      <\/div>\n<\/div>\n<\/li>\n<\/ol>\n
      \n

      Licenses and Attribution<\/strong><\/h3>\n

      CC Licensed Content, Original<\/h4>\n

      This educational material includes AI-generated content from ChatGPT by OpenAI. The original content created by Carol Stallworth from Hillsborough Community College is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0<\/a>).<\/span><\/p>\n

      All images in this textbook generated with DALL-E are licensed under the terms provided by OpenAI, allowing for their free use, modification, and distribution with appropriate attribution.<\/p>\n<\/div>\n

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