Catalyst. Nothing in the world is worth having or worth doing unless it means effort, pain, and difficulty…I have never in my life envied a human being.

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Presentation transcript:

Catalyst

Nothing in the world is worth having or worth doing unless it means effort, pain, and difficulty…I have never in my life envied a human being who led an easy life. -Theodore Roosevelt

Average % Correct for a 3 on the AP Chem Exam

Average % Correct for a 4 on the AP Chem Exam

Average % Correct for a 5 on the AP Chem Exam

Ask Yourself…

Unit 1 Test

Thoughts on Exam 1 Naming Compounds – Homework for the weekend Calculator training after school today. You all need to attend…way too many calculator errors were seen Saturday school in the near future! OPTIONAL but we all need it Don’t know the answer? Try to get something on the paper! Units? Units? Where for ought thou units? Homework…NOT OPTIONAL – Change in homework policy

Today’s Learning Targets

Analyze the Data

Ionic Bonding

Ionic Bond Formation

Coulomb’s Law

Lattice Energies

Covalent Bonding

Lewis Structures

Exceptions to the Octet Rule

Class Example

Table Talk

It’s 10 years in the future and you are teaching your own AP Chemistry course (since we all know that is what you all want to do after college) You give a quiz on Lewis Structures. Correct this struggling student’s paper and provide comments

Formal Charges Many compounds have more than 1 possible Lewis structure. Formal charges tells us the “right” Lewis structure. Formal Charge – The charge an element would have if all electrons were shared equally. The “best” structure has: 1. Atoms that have formal charges closest to 0 2. Highest negative charge on the most electronegative atom

Calculating Formal Charges To calculate formal charge:

Class Example

Table Talk

Class Example

Table Talk

White Board Practice Answer the following questions on your white board Don’t put up the boards until I tell you too!

Question 1 Label the formal charges on the molecule below

Question 2 Label the formal charges on the compound below

Question 3 Label the formal charges on the compound below

Question 4 Draw the Bohr structure for BI 3

Question 5 Draw the Bohr structure for SI 5

Question 6 Draw the Lewis structure for XeF 6

Closing Time Naming Practice Test Error Analysis Worksheet Post – Lab Questions for Lab 3 due Tuesday. NO LONGER A LAB REPORT! Your Welcome

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