Science and Mathematics Institutes
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Science and Mathematics Institutes |
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This site is developed and maintained by Toby M Horn, Ph.D., who is solely responsible for any errors or omissions.
Acids and Bases
| The pH factor: Miami Science Museum web site. Introductory level. Teacher's guide contains lesson plans based on constructivist and investigative laboratory-learning approaches. Recommended by the web site for elementary and middle school levels. However, the site is attractive and a fun review for older students since it connects with experiences outside of a classroom. Explore pH is an interactive meter that shows reactions with pH papers as well. |
| The pH scale derives from the dissociation constant for water. This site, from the University of British Columbia, Canada, contains a tutorial on pH. Real chemistry with mathematics, but clear. You will need the Quicktime plug-in to view the animations. |
| More about the pH scale, with numerous examples of how to calculate pH. Has a pH calculator on the bottom of the page. |
| The power of Hydrogen (pH scale simulation). Sliding scale that shows changing hydrogen ion concentration as decimal, and as a exponent. Requires Shockwave plug-in. |
| Extraction of natural pH indicators from fruits, vegetables and flowers. From the Woodrow Wilson Teachers Fellowship, designed for teachers. |
| Chemistry of acids and bases. Has a linked look-up table so you can calculate pH of weak acids and bases from their concentrations and dissociation constants. |
| Simulation of buffer action |
| Acid-Base titrations |
| Acids, bases and pH |
| Calculations animation |
| Color scale of pH from the US Geological Survey site, Water Science for Schools |
| From the Journal of Chemical Education |
Lesson developed by teachers at Charles Hart Middle School, Washington DC
| Topic | Science concept | Math needed | Learning mode |
| Unit: Acid Base and pH |
powers of ten scientific notation |
investigating, developing technical skills | |
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How to use a transfer pipette Using a multi-well dish |
scientific methods in learning: good technique is important for consistency in data collection |
reading instruments, estimating converting |
technical, "tools of the trade" measure up 1 ml and count out 20 drops |
| Use of cabbage juice as an indicator of acid/alkaline |
different materials are acidic/basic/neutral some pigments change color depending on pH |
observing investigate: what do these different things do vs cabbage joice |
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| pH paper | contains indicator | investigate | |
| pH meter | machines convert concentrtion to number | Ballou got 10 pH meters for CBL from DC ACTS | |
| amazed at color changes especially when looking at household products | |||
| presentation doing something on their own--what do you notice, what do you think | |||
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daily 1 2 3 |
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| Goal so we or a new teacher has all the materials and knowledge at hand. |