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Equilibrium: Crash Course Chemistry #28

  Classroom Resource Information  

Title:

 Equilibrium: Crash Course Chemistry #28

URL:

 https://aptv.pbslearningmedia.org/resource/0795ed6c-6b11-44f8-97eb-c4450deefcd1/equilibrium-crash-course-chemistry-28/

Content Source:

 PBS
Type: Audio/Video

Overview:

In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance, your chemical life. Equilibrium is all about balance and today Hank discusses chemical equilibrium, concentration, temperature, and pressure. Also, he'll chat about Le Chatalier's Principle and Fritz Haber.

Content Standard(s):
Science
SC2015 (2015)
Grade: 9-12
Chemistry
8 ) Refine the design of a given chemical system to illustrate how LeChâtelier's principle affects a dynamic chemical equilibrium when subjected to an outside stress (e.g., heating and cooling a saturated sugar- water solution).*

Unpacked Content
Scientific And Engineering Practices:
Constructing Explanations and Designing Solutions
Crosscutting Concepts: Stability and Change
Disciplinary Core Idea: Matter and Its Interactions
Evidence Of Student Attainment:
Students:
  • Given a chemical system at dynamic equilibrium, identify stresses that can affect equilibrium using LeChatelier's principle and identify the results of those stresses on the system's equilibrium.
  • Given a chemical system at dynamic equilibrium, describe criteria and constraints for refining the system's design.
  • Given a chemical system at dynamic equilibrium, evaluate different stresses by comparing criteria and constraints.
  • Refine the given system to increase product(s) and describe reasoning for refinements.
  • Evaluate the claims, evidence, and reasoning behind explanations or solutions to determine the merits of arguments.
Teacher Vocabulary:
  • system
  • dynamic equilibrium
  • stresses
  • LeChatelier's principle
  • criteria
  • constraints
  • reversible reaction
  • forward/ backward rates
  • macroscopic level
  • atomic/ molecular level
  • claim
  • evidence
  • reasoning
Knowledge:
Students know:
  • Various stresses made at the macroscopic level, such as change in temperature, pressure, volume, concentration, affect a chemical system at the molecular level.
  • Reaction rates of forward/ backward reactions change with stresses until rates are equal again.
  • Forward/ reverse reactions occur at the same rate in dynamic equilibrium, so chemical systems appear stable at macroscopic level.
  • The egineering design process is a cycle with no official starting or ending point, and, therefore, can be used repeatedly to refine your work.
Skills:
Students are able to:
  • Use the engineering design process (ask, imagine, plan, create, improve) to refine a chemical system.
  • Refine a solution to a complex real-world problem, based on scientific knowledge, student-generated sources of evidence, prioritized criteria, and tradeoff considerations.
  • Construct and revise an explanation based on valid and reliable evidence obtained from a variety of sources (including students' own investigations, models, theories, simulations, and peer review).
  • Construct and present arguments supported by empirical evidence and scientific reasoning to support or refute an explanation or a model for a phenomenon or a solution to a problem.
Understanding:
Students understand that:
  • Much of science deals with constructing explanations of how things change and how they remain stable.
  • Solutions to real-world problems can be refined using scientific knowledge, student-generated sources of evidence, prioritized criteria, and tradeoff considerations.
  • In many situations, a balance between a reaction and the reverse reaction determines the numbers of all types of molecules present.
  • Criteria may need to be broken down into simpler ones and decisions about the priority of certain criteria over others (tradeoffs) may be needed.
AMSTI Resources:
ASIM Module:
This standard does not require students to calculate equilibrium constants and concentrations. Chemical Equilibrium; Modeling Reversible Reactions and Determining "K"
Tags: chemical equilibrium, chemistry, concentration, Fritz Haber, Le Chatalier, pressure, temperature
License Type: Custom Permission Type
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AccessibilityVideo resources: includes closed captioning or subtitles
Comments

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Author: Stephanie Carver
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