Visualizing Molecules in Three Dimensions
Chemistry Guide to Visualizing Molecules in Three Dimensions Although we often see molecules depicted using two-dimensional (2-D) figures, they are in fact three-dimensional (3-D). Many scientific questions can be better understood by seeing and ... [... more]
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Chemistry Resources
The following link has a printable, one-page version of the Periodic Table of the Elements, the indispensable organizational chart for chemists: Chemistry Resources [... more]
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Chemistry Safety Guide
Safety is a key concern in any scientific enterprise, but particularly so in the chemistry lab. There are many potential hazards when working with chemicals, but all of them can be avoided with the appropriate precautions. When working with ... [... more]
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Chemistry Lab Techniques
Before starting any experiment, you should understand the entire procedure that you will be following. You need to make sure that you have the proper equipment, and that you know how to use it. When you are trying an unfamiliar procedure for the ... [... more]
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Guide to Purchasing Chemicals
Knowing which chemical to buy and where to purchase it can be a confusing part of preparing for your science fair project. This guide will help you navigate some of those challenges. Most, but not all, chemicals are labeled with a grade. The ... [... more]
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Acids, Bases, & the pH Scale
In order to deal with these large numbers more easily, scientists use a logarithmic scale, the pH scale. Each one-unit change in the pH scale corresponds to a ten-fold change in hydrogen ion concentration. The pH scale ranges from 0 to 14. It's a ... [... more]
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Paper Chromatography Resources
Recommendations for papers and solvents to be used in experiments involving paper chromatography. Paper chromatography is an inexpensive method for analyzing some types of chemical mixtures. Here are our recommendations for paper and readily ... [... more]
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Paper Chromatography: Basic Version
The water (solvent) is the mobile phase of the chromatography system, whereas the paper is the stationary phase. These two phases are the basic principles of chromatography. Chromatography works by something called capillary action. The ... [... more]
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Adult supervision required.
Keeping in mind that an increase in temperature reflects an increase in the average molecular motion, how will increased temperature affect the reaction rate? What temperature change is required to increase the reaction time by a factor of ... [... more]
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Big Pieces or Small Pieces: Which React Faster?
The goal of this project is to measure the effect of reactant particle size on the rate of a chemical reaction. When the solid material has completely disappeared and the bubbles have stopped forming, say "Stop!" to have your helper stop the ... [... more]
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How to Make the Boldest, Brightest Tie Dye!
The goal of this project is to test how strongly fiber-reactive dyes color different fabric types. Fabrics are made from many different fiber types. Some fabrics, like cotton, wool, and linen, are made from natural fibers. Other fabrics, like ... [... more]
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What's the Point of Boiling?
The goal of this project is to separate pure water from fruit juice using a simple stovetop distillation apparatus. This project uses the technique of distillation. Distillation is when you boil a liquid, and then capture the vapor that escapes ... [... more]
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