Chemistry
Chemistry 15: 3-4
Homework
Chemical Equilibrium Constants
Chapter 15: 3-4 Homework
- Reading Preparation
- WebLecture
- Study Activity
- Preparation work for chat
- Online Quiz
- Lab Instructions
Reading Preparation
Textbook assignment: Read Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 15: Sections 3 and 4.
Kotz and Triechel, Chemistry and Chemical Reactivity Chapter 15: Sections 3-4.
Study Notes
- 15.3 We determine the equilibrium constant experimentally, by measuring the concentration of the products and reactants over time and determining when the reaction comes to equilibrium, then us the final concentrations to calculate the equilibrium constant. We create a table that identifies the initial concentrations, the amount of change, and the equilibrium concentrations.
- 15.4 Once the equilibrium constant has been calculated for one set of conditions, we can determine the final concentrations of a set of reactants for all other conditions, including overall concentrations when a reaction requires multiple steps. The method involves identifying initial and final concentrations, and the amount of change.
Key Formula
| Equilibrium Constant Determinations | |||||||
|---|---|---|---|---|---|---|---|
| Components | Reactants | Products | |||||
| Reaction Equation | aA | + | bB | ↔ | cC | + | dD |
| Initial concentrations (Molarity) | [A] | [B] | 0 | 0 | |||
| Change in concentration (Molarity) | -ax | -bx | +cx | +dx | |||
| Equilibrium concentrations (Molarity) | [A]-ax | [B]-bx | +cx | +dx | |||
Web Lecture
Read the following weblecture before chat: Using the Equilibrium Constant
Study Activity
Videos for Chapter 15: Principles of Chemical Reactivity: Equilibria
Review the Videos at Thinkwell Video Lessons.
- Under "Chemical Equilibrium"
- Using Equilibrium Constants
- Strategies for Solving Equilibrium Problems
- Solving Problems far from Equilibrium
- An Equilibrium Problem Using the Quadratic Equation
- Using Equilibrium Constants
I haven't found a good simulation yet....
Chat Preparation Activities
- Essay question: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer before chat starts for this session.
- Mastery Exercise: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.
Chapter Quiz
- There is no chapter quiz YET.
(Aligns to) AP #12 GUIDED INQUIRY — Determining the rate law — Phase I
Using the resources below, select a reaction and one of the methods developed in Lab #11 that you can use to determine the concentration of its reactants and products at periodic intervals. Identify the materials and equipment, and outline the procedure you will use to colect concentration data at set intervals.
Resources:
- IGHCE Lab 12.3 Determination of the effect of Concentration on Reaction Rate
- HSCKM VI-3 Determining a Reaction Order
- APGIE Investigation 11: What Is the Rate Law of the Fading of Crystal Violet Using Beer’s Law
- There is no alternative form of this lab.
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