{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

chm115_lecture18

chm115_lecture18 - Chemistry 115 Lecture 18 Outline Chapter...

Info icon This preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 115 Lecture 18 Outline Chapter 8 Review VSEPR Molecular shape and polarity HW 8 Due Friday March 25, 11 pm. Recitation: Electronegativity VSEPR, molecular shapes Molecular polarity
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
VSEPR theory If 2, 3, 4, 5, 6 objects attached at a central point and maximize the space around them, they form 5 different geometric patterns. The electron group patterns are the following, and depend on both bonded and non-bonded electrons: Two - Linear Three - Trigonal Planar Four - Tetrahedral Five - Trigonal Bipyramidal Six - Octahedral m n The Bond Angle is defined by the angle between two surrounding atoms and the central atom. These are idealized bond angles, and are not exactly the same for different surrounding atoms. Molecular shapes depend on what is bonded, so that the same electron- group arrangement can have different molecular shapes.
Image of page 2
Once we get beyond 3 groups, it takes three dimensional shapes to move pairs of electrons (lone pairs and bonding pairs) as far apart as possible two three four five six Electron Group Arrangements
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
When all of these electron pairs are bonding pairs (connect atoms), the Electron Group Arrangements correspond to Molecular Shapes two three four five six
Image of page 4
From Lewis Dots to Molecular Shape using VSEPR Theory Steps: 1. Write the formula 2. Identify the central atom(s) 3. Draw the Lewis Structure 4.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern