Chemical Reactions and Stoichiometry

Control the concentrations of molecules and temperatures of reactions to explore reaction rate, and learn to balance chemical equations.

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Requirements

On OS X 10.9 or newer, you will need to install a launcher application to run this Java activity. If you have not already installed it, please:

  • Download the launcher installer
  • Open the downloaded .dmg file and drag the CCLauncher application to your Applications folder
  • Return to this page and launch the resource

In this activity, students explore reactions in which chemical bonds are formed and broken. Students experiment with changing the temperature and the concentration of the atoms in order to see how these affect reaction rates. They also learn how to communicate what happens during a chemical reaction by writing the ratios of reactants and products, known as stoichiometry.

» Teacher Guide

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Download Size: 5 MB

WARNING: Your data will not be saved. To save data, run this activity as a registered user. You can register at the project portal. Please view the requirements below before launching this activity.

Subject
Chemistry

Grade Level
High School

License
CC BY 4.0

AAAS Benchmark Alignments (2008)

4. The Physical Setting

4D. The Structure of Matter
  • 4D/M1a. By the end of the 8th grade, students should know that all matter is made up of atoms, which are far too small to see directly through a microscope.
  • 4D/M1b*. By the end of the 8th grade, students should know that the atoms of any element are like other atoms of the same element, but are different from the atoms of other elements.
  • 4D/M3ab. By the end of the 8th grade, students should know that atoms and molecules are perpetually in motion. Increased temperature means greater average energy of motion, so most substances expand when heated.
  • 4D/M3cd. By the end of the 8th grade, students should know that in solids, the atoms or molecules are closely locked in position and can only vibrate. In liquids, they have higher energy, are more loosely connected, and can slide past one another; some molecules may get enough energy to escape into a gas. In gases, the atoms or molecules have still more energy and are free of one another except during occasional collisions.
  • 4D/M4. By the end of the 8th grade, students should know that the temperature and acidity of a solution influence reaction rates. Many substances dissolve in water, which may greatly facilitate reactions between them.
  • 4D/M6b*. By the end of the 8th grade, students should know that an important kind of reaction between substances involves the combination of oxygen with something else-as in burning or rusting.
  • 4D/M7a*. By the end of the 8th grade, students should know that no matter how substances within a closed system interact with one another, or how they combine or break apart, the total mass of the system remains the same.
  • 4D/M11** (NSES). By the end of the 8th grade, students should know that substances react chemically in characteristic ways with other substances to form new substances with different characteristic properties.
  • 4D/M12**. By the end of the 8th grade, students should know that if samples of both the original substances and the final substances involved in a chemical reaction are broken down, they are found to be made up of the same set of elements.
  • 4D/H2*. By the end of the 12th grade, students should know that the number of protons in the nucleus determines what an atom's electron configuration can be and so defines the element. An atom's electron configuration, particularly the outermost electrons, determines how the atom can interact with other atoms. Atoms form bonds to other atoms by transferring or sharing electrons.
  • 4D/H9a. By the end of the 12th grade, students should know that the rate of reactions among atoms and molecules depends on how often they encounter one another, which is affected by the concentration, pressure, and temperature of the reacting materials.

11. Common Themes

11B. Models
  • 11B/M1*. By the end of the 8th grade, students should know that models are often used to think about processes that happen too slowly, too quickly, or on too small a scale to observe directly. They are also used for processes that are too vast, too complex, or too dangerous to study.
  • 11B/M4** (BSL). By the end of the 8th grade, students should know that simulations are often useful in modeling events and processes.

Copyright
© Copyright The Concord Consortium

Record Link
<a href="">The Concord Consortium. Chemical Reactions and Stoichiometry. Concord: The Concord Consortium, 2010, September 23.</a>

AIP
Chemical Reactions and Stoichiometry (The Concord Consortium, Concord, 2010, September 23), WWW Document, (https://concord.org/).

AJP
Chemical Reactions and Stoichiometry (The Concord Consortium, Concord, 2010, September 23), WWW Document, (https://concord.org/).

APA
Chemical Reactions and Stoichiometry. (2010, September 23). Retrieved 2017, April 29, from The Concord Consortium: https://concord.org/

Disclaimer: The Concord Consortium offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure.

Requirements

This activity requires the Java Runtime Environment version 5 (sometimes referred to as 1.5) or later with Java Webstart. You can download it at java.com.

On OS X 10.9 or newer, you will need to install a launcher application to run this Java activity. If you have not already installed it, please:

  • Download the launcher installer
  • Open the downloaded .dmg file and drag the CCLauncher application to your Applications folder
  • Return to this page and launch the resource

The download for this activity will require 5 MB of disk space.

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Science of Atoms and MoleculesThis resource is a part of the Concord Consortium's Science of Atoms and Molecules project.

Grade Level
High School
Subject
Chemistry
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