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Index Results
(14 Results)

AP4505 - $65.30
An ingenious idea to introduce and demonstrate phase diagrams and triple point using dry ice. At atmospheric pressure carbon dioxide exists only as a solid or gas. However, in a closed system, liquid carbon dioxide will exist when the pressure exceeds...
AP7043 - $53.30
In this set of three demonstrations, students will observe a series of dramatic changes when common ions are added to solutions at equilibrium. The results illustrate the nature of equilibrium and LeCh,telier's principle. • Adding strong and weak acid...
AP8471 - $30.05
Demonstrate the power of balance in a reversible chemical reaction with this updated version of a classic demonstration! A solution of cobalt chloride turns from pink to blue and back again in a series of transformations as the concentrations of reactants...
FB0011 - $70.41
When nitrogen and oxygen—the two primary components of the air we breathe—combine under certain conditions the results can be devastating. In this demonstration nitrogen oxides are generated by the dissolution of copper in nitric acid and the resulting...
AP6649 - $17.20
A free-flowing U-shaped tube contains what appears to be a homogenous blue liquid, yet the liquid levels in the sides of the tube are unequal. No tricks involved—just density! This simple demonstration is guaranteed to heighten student interest on...
AP6888 - $39.05
Phase changes such as melting and evaporation can be very “moving” events when molecules are the size of balls! A tub-full of jumbo rubber balls is a perfect demonstration device for comparing the energy and motion of molecules in the solid, liquid,...
AP6928 - $51.00
Molecules can't be seen, but we can see the forces between molecules. Use this set of four demonstrations to show students what happens when molecules attract each other—or don't! • Floating Oil Droplet The difference in densities of water and ethyl...
AP7046 - $34.00
Is it possible to pour a gas? Set up the specially designed ramp with equally spaced candles. Add a clear liquid to the beaker, hold the beaker at the top of the ramp, and pour the invisible contents. One by one the candles are snuffed out! The beaker...
AP7334 - $29.25
Bananas are a good source of potassium—but do they also contain sodium? This flame test demonstration provides a safe, unique method for observing flame test colors of metal ions—no flammable solvents required! Demonstrate the characteristic colors...
AP7378 - $38.10
A fun way to shed some light on core chemistry concepts! Using common glow sticks, students learn about chemiluminescence, pH optimization, acid–base chemistry, and the action of a catalyst. Compare the effervescent glow of light sticks with different...
FB1025 - $38.75
This oil polymer demonstration will undoubtedly capture your students’ interest, stimulate scientific inquiry, and will heighten their awareness of the emerging environmental pollution issues facing our society.   A new form of hydrocarbon stabilization...
AP7435 - $42.55
H. J. H. Fenton, an English chemist, discovered in 1894 that some metal ions, particularly the iron(II) ion, catalyze the decomposition of hydrogen peroxide to generate highly reactive intermediates. Fenton’s reaction has been “rediscovered” and is...
AP7445 - $17.80
50 + 50 doesn’t always equal 100! Many students have heard that matter is not created or destroyed. This concept relates to mass but not to volume or moles. Show students that adding two identical volumes does not always give twice the volume when...
AP7448 - $19.25
Water always boils at 100 °C, right? Not always! Water boils at 100 °C at 1 atmosphere of pressure. Every liquid boils at the temperature at which its vapor pressure equals the pressure above its surface. Change the pressure and the required boiling...
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