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Equilibrium Concepts: LeChatelier Principle & Keq Calculation

Join the St. Patty's Day chemistry lesson to learn about calculating Keq, LeChatelier's Principle, and equilibrium reactions. Find a partner for collaborative worksheet analysis, ask questions, draw concentration vs. time graphs, and practice Keq calculations. Homework includes finishing Equilibrium Worksheet and Moodle Knowledge Checks. Lab quiz and test dates provided.

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Equilibrium Concepts: LeChatelier Principle & Keq Calculation

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  1. Wed, March 17, 2010 • Learning Goal: to calculate Keq • Questions over the LeChatelier Wkst • Questions over the reading • Homework

  2. Happy St. Patty’s Day! • Find a partner and compare answers to the LeChatelier Wkst (with arrows) • What questions do you have?

  3. Questions over the reading(Section 19.2) • Draw 2 graphs of concentration vs time for a completion reaction and a reversible reaction. • What is the formula for Keq? • Write the equilibrium expression for the following reaction: N2 (g) + 3H2 (g)  2NH3 (g) • Calculate the Keq for the reaction in #3 above when [H2]=0.15 mol; [N2]=0.25 mol and [NH3]=0.10 mol • What does it mean if Keq > 1? What if Keq < 1?

  4. Homework: • Finish Equilibrium Wkst (pg one of stapled packet) • Knowledge Checks on Moodle: • LeChatelier Knowledge Check (Sec 19.2) • Open from Wed at 7AM to Friday at 10pm • Reaction Rates and Progression Curve (Sec 19.1 & 19.5) • Reopened from Wed 7AM to Thurs 11:30pm • LeChatelier Lab Quiz – Moodle • Bring labs on Friday • Ch 19 TEST (Sec 19.1, 19.2 and 19.5) on Fri, April 2!

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