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Introduction to Chemistry

Chemistry Mole

Do you wonder what chemistry is or why you would want to study it? Take a look at answers to some basic questions about chemistry.

Learn About Chemistry
Chemistry Spotlight10

Do You Burn More Calories when you Think Hard?

Find out how many calories you burn when thinking and how it compares with the energy expended by physical exercise.

Can You Use Laundry Detergent in the Dishwasher?

Yes, you could put laundry detergent in your dishwasher. Should you? Probably not. Here's why.

Does Bottled Water Go Bad?

Most bottled water has an expiration date stamped on the bottle, but does the bottled water actually go bad? If so, how long is bottled water good? Here's the answer to this common question.

How Do Mood Rings Work?

Mood rings have a stone that changes color depending on your emotions. Learn how mood rings work.

Is There a Pool Urine Detector or Pool Urine Indicator Dye?

Have you ever wondered whether there really is such a chemical as a pool urine detector or pool urine indicator dye? Such a dye supposedly clouds the water or produces a color when someone urinates in a swimming pool. Does a urine indicator really exist?

Compounds with Both Ionic and Covalent Bonds

Some compounds contain both ionic and covalent bonds. Here are examples of compounds that exhibit both types of chemical bonding.

How To Make Homemade Magic Sand

Use two common household materials to make homemade Magic Sand that doesn't get wet in water.

What Is Bleach and How Does It Work?

Learn about the different types of bleaches and how they work.

July 11 Science History

Learn about the history of science by reading about the significant scientific events that took place on this day in history.

Hot Ice or Sodium Acetate

Sodium acetate, also known as 'hot ice' is an amazing chemical you can easily prepare yourself using baking soda and vinegar. You can cool a solution of sodium acetate below its melting point and then cause the liquid to crystallize. The crystallization is an exothermic process, so the resulting ice is hot. Solidification occurs so quickly you can form sculptures as you pour the hot ice.

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