1 / 16

Molecular Polarity

Molecular Polarity. Objective Today I will be able to: Predict the molecular shape of a molecule using the VSEPR theory Predict the polarity of molecules based on the molecular shape Evaluation/ Assessment

sbrice
Download Presentation

Molecular Polarity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Molecular Polarity

  2. Objective • Today I will be able to: • Predict the molecular shape of a molecule using the VSEPR theory • Predict the polarity of molecules based on the molecular shape • Evaluation/ Assessment • Informal assessment – Listening to group interactions as they completethe molecular shapes lab and practice worksheets. • Formal Assessment – Analyzing student responses to the exit ticket and the practice worksheets. • Common Core Connection • Make sense of problem and persevere in solving them • Reason abstractly and quantitatively • Use appropriate tools strategically • Look for and make use of structure

  3. Lesson Sequence • Warm – Up • Explain: Molecular Polarity • Elaborate: Molecular Shapes Lab Polarity • Formal and informal assessment • Elaborate: Molecular Polarity Worksheet • Elaborate: VSEPR Theory Practice • Evaluate: Exit Ticket • Formal assessment

  4. Warm - Up • What does VSEPR stand for? • What is the VSEPR Theory? • Why do the molecules form these specific shapes?

  5. Objective • Today I will be able to: • Predict the molecular shape of a molecule using the VSEPR theory • Predict the polarity of molecules based on the molecular shape

  6. Homework • Finish VSEPR Theory Practice

  7. Agenda • Warm-Up • Molecular Polarity Notes • Predicting Polarity in Molecular Shapes Lab • Molecular Polarity Worksheet • VSEPR Theory Practice • Exit Ticket

  8. Polarity

  9. Molecular Polarity • Just because a molecule has polar bonds does not mean it is a polar molecule • We have to look at the overall shape of the molecule • Two or more polar bonds may cancel each other out leading to a nonpolar molecule

  10. A molecule will be nonpolar if… • All of the terminal atoms (or groups) are the same • If all of the terminal atoms (or groups) are symmetrically arranged around the central atom • The terminal atoms (or groups) have the same charges • Example: CO2

  11. A molecule will be polar if… • One or more terminal atoms differ from each other • The terminal atoms are not symmetrically arranged • Polar molecules will have one slightly positive end and one slightly negative end • Example • H2O • NH3

  12. Polarity Examples

  13. Molecular Shapes Lab • Revisit the molecular shapes lab • Fill out the column labeled polarity • Please ask questions!

  14. Molecular Polarity Worksheet Complete in class and we will review selected answers as a group

  15. VSEPR Theory Practice Complete worksheet, whatever is not finished will be your homework

  16. Exit Ticket • Determine if the following molecules are polar or nonpolar • (Hint: Draw a Lewis structure) • Cl2 • H2O • CH3Br • CH4

More Related