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Chemical Reactions (9-12)
* Chemical reactions occur all around us, all the time.
*Chemical reactions may release or consume energy. *
A large number of important reactions involve the transfer of either
electrons or hydrogen ions between reacting ions, molecules, or atoms.
* Chemical reactions can take place in a fraction of a second or some
can take billions of years. * Catalysts
accelerate chemical reactions. Chemical reactions in living organisms
are catalyzed by protein molecules called enzymes. (NSES,
1996)
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In the rectangle above, you will find the fundamental
concepts and principles that underlie this standard. Below you will find a list
of recommended "learning tools" for this standard. All links are in yellow,
just click the link. Numbers are for reference only. Use our "Tell a
Friend" feature, at the bottom, to send this page to a friend!
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PhET continues to develop amazing
interactives. The name of this tool is
Acid-Base Solutions. How do strong and weak acids differ? Use lab
tools on your computer to find out! Dip the paper or the probe into
solution to measure the pH, or put in the electrodes to measure the
conductivity. Then see how concentration and strength affect pH. Can a
weak acid solution have the same pH as a strong acid solution? If you
have Java, just click on RUN NOW. The
main PhET site can be found here. |
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This clever and clear learning tool is
called
pH
Scale. This is a Java applet. Just click RUN NOW below the picture.
Test the pH of things like coffee, spit, and soap to determine whether
each is acidic, basic, or neutral. Visualize the relative number of
hydroxide ions and hydronium ions in solution. Switch between
logarithmic and linear scales. Investigate whether changing the volume
or diluting with water affects the pH. Or you can design your own
liquid! This tool is brought to us by The
PhET
Project and made possible by the
Kavli Operating Institute.
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Choose the metal of your electrode, then
the solution, turn on the electricity and watch your
Electrolysis "learning tool" run. This textured and elegant
demonstration is brought to us by the
Department of Chemistry at Iowa
State University. |
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The name of this "learning tool" is called
Qualitative Analysis of Anions. Simple, elegant, and conceptually
clear students must identify an unknown by using the reagents and the
equipment provided on the Lab Bench. When you get to the site, after you
read the one page Lab Manual, make sure you click on the Lab Bench tab.
This tremendous interactive is brought to us by
ChemLab at Dartmouth University. |
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The
Chemistry Collective is a
collection of virtual labs, scenario-based learning activities, and
concepts tests which can be incorporated into a variety of teaching
approaches as pre-labs, alternatives to textbook homework, and in-class
activities for individuals or teams. It is organized Carnegie Mellon
University. Make sure you try the
Virtual Lab
Simulator. It is incredible! |
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The name of this learning tool is
Reactions and Rates. Find out what affects the rate of a reaction.
Do experiments, collect data, and then calculate rate coefficients. Play
with different reactions, concentrations, and energy. This is a
Java applet, just click RUN NOW under the picture. This tool is brought
to us by The
PhET
Project and made possible by the
Kavli Operating Institute.
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The name of this "learning tool" is called
Qualitative Analysis of Cations. Simple, elegant, and conceptually
clear students must identify an unknown by using the reagents and the
equipment provided on the Lab Bench. When you get to the site, after you
read the one page Lab Manual, make sure you click on the Lab Bench tab.
This tremendous interactive is brought to us by
ChemLab at Dartmouth University. |
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The name of this wonderful learning tool is
Salts and Solubility. This is a Java applet, just click RUN NOW
under the picture. Add different salts to water, then watch them
dissolve and achieve a dynamic equilibrium with solid precipitate.
Compare the number of ions in solution for highly soluble NaCl to other
slightly soluble salts. Relate the charges on ions to the number of ions
in the formula of a salt. Calculate Ksp values. This tool is brought to
us by The
PhET
Project and made possible by the
Kavli Operating Institute.
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One of the most innovative science
education companies is
Explorelearning.com, they call their simulations, Gizmos. They are a
subscription site ,
but they allow you to see this Gizmo for 5 minutes. Just
click on the
Limiting Reactants to see their wonderful "learning tool".
Shockwave is required. |
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This "learning tool" does a great job of allowing student to conceptually
understand
Balancing Chemical Equations. Four representative equations are presented. One of the most innovative science education
companies is
Explorelearning.com, they call their simulations, Gizmos. They are a
subscription site,
but they allow you to see this Gizmo for 5 minutes.
Shockwave is required. |
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One of the most innovative science
education companies is
Explorelearning.com, they call their simulations, Gizmos. They are a
subscription site,
but they allow you to see this Gizmo for 5 minutes. Just
click on the
pH Analysis to see their wonderful "learning tool".
Shockwave is required. |
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ChemCases.com is a web-based resource of curriculum supplements for
teaching the second semester general chemistry course. Each case study
features a number of the basic principles covered in a traditional general
chemistry curriculum. They use these concepts to address the decisions
that influence development of successful consumer, agricultural and
pharmaceutical products. |
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