Environmental Chemistry
TIP - Group 2
Toxic Lead and Solubility - Teacher's Guide
Noreen Shaukat
Tracie Fulks
Justin Leonard
Anna Rhymes
Objective: After an introduction to double replacement precipitation reactions, students will discover and
generate general solubility rules for common ionic compounds. Students will then apply this knowledge
while testing for toxic lead compounds in paint chips. This lesson will also focus on lead pollution in the
soil and water and the effects of lead on plants, microorganism, and animals (humans). This guide includes
a 4-day lesson plan with detailed suggestions for each day. A pre-assessment, introductory solubility lab
activity, a lecture PowerPoint, homework set, investigation/application lab activity related to lead pollution,
and a final assessment are also included.
At the completion of this lesson set, the students:
1.
2.
3.
Will have a general understanding of precipitation reactions and will be able to predict the
products.
Will have a general understanding of the sources of lead and how it affects plants and humans.
Will have a general understanding of the lead pollution around own home.
Schedule Overview:
The target audience for this lesson set is high school introductory chemistry students (grades 10-12). This
lesson set is designed to be presented in 4 days during 90-minute segments.
Day 1 –Pre-assessment and writing Solubility Rules Lab Activity, Homework-Finish writing solubility
rules and find a recent journal or news article relating to lead and human health and write a one-paragraph
summary of the article
Day 2 –Compare group’s solubility rules to published solubility rules, Share a few news summaries
(volunteers), PowerPoint Lesson on Lead, Share more Summaries if time permits, Homework – Find paint
chip samples for your lab activity and prepare your data table
Day 3 – Laboratory Activity and collaborate with other lab groups to create a large data table (try to
compare age of paint to lead content), Homework –prepare for final assessment
Day 4 –Final Written Assessment
Detailed Schedule follows on the next page: Time Frame: The days in this time frame are based on 90minute period.
Detailed Schedule:
Day 1 –Pre-assessment and writing Solubility Rules Lab Activity
Warm-up activity – 30 minutes; Students complete a pre-assessment: Once handed in, students discuss
their thoughts about the questions with an assigned lab group.
Writing Solubility Rules Lab Activity - 55 minutes: Assign a lab group (of three or four students),
explain the activity and allow them time to create a data table. Check each group’s data table before
allowing them to begin. Encourage them to take observations during the lab activity, so they can reference
their data while writing their solubility rules. Once they complete the activity, remind them to
Wrap-up Discussion – 5 minutes; Review of important points and read over homework assignment with
students.
Homework #1 – Homework-Finish writing solubility rules and research to find a recent journal or news
article relating to lead and human health and write a one-paragraph summary of the article
Day 2 –, PowerPoint Lesson on Precipitation reactions and Lead, Share more Summaries if time permits,
Warm-up activity –
15 minutes; students get back into lab groups, have them compare their solubility rules to the published
ones on the power point (compare and contrast) also, share a quick synopsis of the news summaries
15 minutes – Share out group summary of solubility rule comparing and contrasting, then have volunteers
share out their article summary
PowerPoint Presentation – 55 minutes; The PowerPoint is interactive. Time should be allowed for
students to discuss questions and answer problems with a partner before moving forward with the
discussion as a class.
Wrap-up Discussion – 5 minutes; Review of important points and read over homework assignment with
students.
Homework #2 – Find paint chip samples for your lab activity and prepare a suitable data table.
Day 3 – Laboratory Activity Homework –prepare for final assessment
Warm-up activity – 10 minutes; Discuss the lab procedure as well as safety precautions.
Experiment –– 60 minutes; In Pairs, record observations in your lab table
Post-Lab Calculations – 20 minutes; collaborate with other groups to create a shared document containing
a large data table about paint chips versus their age of the paint
Howework #3: Review for the final assessment by reviewing and correcting their graded homework #1.
Day 4 – Final Written Assessment