Chemistry

Take the weak acid vinegar, substitute three chlorine atoms for the three hydrogen atoms, and remarkably, the new acid is 10,000 times more powerful! Acids vary greatly in their strength- their ability to ionize or produce H+ ions when dissolved in w...

Not all acids are created equal! Compare the “frothing and foaming” reaction of two different acids with calcium carbonate using our exclusive “rainbow acid” universal indicator. The indicator produces a rainbow spectrum of color changes in the pH ra...

Buffers provide an essential acid-base balancing act in living cells, lakes, and in many consumer products. What are buffers made of and how do they work? First, prepare an ideal pH 7 phosphate buffer - the same buffer that protects enzymes and prote...

It's magic! It's mystery! No-it's science. Teachers and students write secret messages with disappearing ink and then use chemistry to develop and transmit the messages. Students learn about the properties of a characteristic acid-base indicator and ...

Your students will love this colorful demonstration which is always a teacher favorite at science conventions. A colorless solution is added to each of six seemingly empty beakers. A second colorless solution is then added and each of the six resulti...

Watch as thick white vapor clouds pour up and out of the bubbling cauldrons on your demonstration table! This eye-catching dry ice demo is sure to get a “cool” reaction from your students! It makes a great demo to try at Halloween or any time you wan...

Acids are acidic, bases are basic, and salts are neutral-right? Not exactly! Teach your students that certain salts dissolve in water to produce acid solutions and others produce basic solutions. Using universal indicator in Petri dishes displayed on...

Can Red + Red = Blue? Dip a red sponge into a red solution-watch it turn blue. Place the blue sponge into a blue solution-it turns back to red. How can that happen? Amaze your students as you introduce acid-base indicators with this “discrepant event...

Add a clear liquid to a red solution and watch as the colors of the rainbow appear in sequence. But wait, there's more! After a few seconds, the colors of the solution mysteriously reverse directions-switching from violet to blue, green, yellow, oran...

Change a beaker of “orange juice” into a big, foamy, messy strawberry float! Simply mix some chemicals together in a beaker, add an acid-base indicator and a colorless solution, and stand back. A huge mountain of foam will erupt out of the beaker. Th...

Let's make a rainbow out of the blue! Produce the entire spectrum of colors by simply adding blue food dye to varying concentrations of acid solutions. Relate the structure of the indicator dye in acid solutions to its conjugated ring system. Then di...

A colorless solution is poured from a large beaker into four smaller beakers producing solutions of "strawberry soda," "blueberry soda," "red wine," and "water." Mixing the resulting solutions from the first th...

The demo with a surprise ending! Two copper pennies are dissolved in nitric acid, producing a green solution. As the pennies dissolve, the NO2 gas produced is bubbled through a (blue) basic solution containing universal indicator. As the NO2 gas diss...