Reactions & Rates

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  • Reaction
  • Kinematics
  • Concentration

Topics

  • Reaction
  • Kinematics
  • Concentration
  • Equilibrium

Description

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Sample Learning Goals

  • Explain why and how a pinball shooter can be used to help understand ideas about reactions.
  • Describe on a microscopic level what contributes to a successful reaction (with illustrations).
  • Describe how the reaction coordinate can be used to predict whether a reaction will proceed or slow.
  • Use the potential energy diagram to determine: The activation energy for the forward and reverse reactions; The difference in energy between reactants and products; The relative potential energies of the molecules at different positions on a reaction coordinate.
  • Draw a potential energy diagram from the energies of reactants and products and activation energy.
  • Sketch how the number of reactants and products will change as a reaction proceeds.
  • Explain how they know that a system has reached equilibrium from a graph of number of reactants and products versus time.
  • Predict how raising or lowering the temperature will affect a system in the equilibrium position.
  • Describe the relative sizes of the forward and reverse rates at equilibrium.
  • Explain what effects whether the equilibrium position favors the products or the reactants.
  • Predict how addition of a reactant or product will affect the forward and reverse reaction rates, and once this new system reaches equilibrium how the reactant and product concentrations will compare to the original system at equilibrium.
  • Compare graphs of concentration vs. time to determine which represents the fastest or slowest rate.
Version 1.07

Teacher Tips

Download teacher tips PDF Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

Teacher-Submitted Activities

Using PhET in High School Chemistry- all my activities in pdf A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Intro
HS
Lab
HW
Demo
Chemistry
Concept Questions for Chemistry using PhET A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
MS
MC Chemistry
Reactions and Rates 4: Equilibrium LeChatlier A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Intro
HS
HW
Lab
Chemistry
Reactions and Rates 4 lessons (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
Demo
HW
Lab
CQs
Chemistry
Salts and Solubility 5 Activities in pdf A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
Other Earth Science
Chemistry
Reactions and Rates 3: Introduction to Equilibrium (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Intro
HS
Lab
CQs
HW
Chemistry
Reactions and Rates 2: Intro to Kinetics (inquiry based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
Lab
CQs
HW
Chemistry
Reactions and Rates College version for tab 3- kinetics (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein UG-Adv Lab Chemistry
Reactions and Rates 1 Introduction to reactions (Inquiry Based) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. This contribution was designed by PhET. Trish Loeblein HS
UG-Intro
Lab
Demo
CQs
Chemistry
Exploring Equilibrium 2 (Le Chatelier's Principle) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. Amy Jordan HS Lab Chemistry
Exploring Equilibrium A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. Amy Jordan HS Lab Chemistry
Kinetics Guided Inquiry A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. Chris Dewberry UG-Intro Lab
HW
Other
CQs
Reaction Rates A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines. Emily Firchau HS Lab Chemistry
PhET Sims Aligned to the Chemistry Curriculum This contribution was designed by PhET. Julia Chamberlain HS
UG-Intro
Other Chemistry
Alignment of PhET sims with NGSS This contribution was designed by PhET. Trish Loeblein HS Other Physics
Chemistry
Earth Science
Biology
How do PhET simulations fit in my middle school program? This contribution was designed by PhET. Sarah Borenstein MS Other Biology
Physics
Earth Science
Chemistry
Reactions and Rates: Learning Goals from the design team (Inquiry Based) This contribution was designed by PhET. Trish Loeblein, Linda Koch UG-Intro
UG-Adv
HS
Other Chemistry
MS and HS TEK to Sim Alignment Elyse Zimmer HS
MS
Other Biology
Physics
Chemistry
Understanding Rates of Reactions Lauren Petersen MS
UG-Intro
HS
Lab
Guided
HW
Chemistry
Reactions and Rates Jefferson County Middle School Workshop MS Lab Chemistry
LeChateilier's Principle - Concentration Robert Strauss HS Lab
반응과 반응속도 SIM 사용지침서 이화국(Wha Kuk Lee) UG-Intro
HS
Other
Demo
Lab
Biology
Chemistry

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Design Team Third-party Libraries Thanks To
  • Linda Koch (lead)
  • Ron LeMaster (developer)
  • Trish Loeblein
  • Kathy Perkins
  • Interviewer: Mindy Gratny