The yield of ester can be increased either by removing one of the products of the reaction as it is formed or by increasing the concentration of one of the...
Le Chatelier’s Principle is a qualitative rule, which allows the prediction of the effect of temperature, pressure and concentration changes on chemical reactions. The principle states: A chemical system at...
Using the method of continuous variation, two solutions are combined in various ratios. To select the ratio that produces the most product or consumes the most reactants, students must find...
An activity series of metals is a table of metals arranged in the order of their decreasing chemical activity or the ease at which the metal will give up one...
Employ Hess’s Law of enthalpy based on the observed data for two reactions. Students can measure the temperatures of the reaction in a calorimeter and analyze the data calculating the...
A copper “pen” will be used to electrolyze a solution of potassium iodide and draw on a piece of filter paper. The color of the “ink” will change depending on...
The electrolysis of a tin (II) chloride solution demonstrates the oxidation and reduction of Sn2+ ions as beautiful tin crystals grow and spread throughout the solution. There are enough materials...
Explore the interesting properties of nanomaterials by reducing a solution of gold (III) chloride to form colloidal gold nanoparticles. As the reaction occurs, the mixture undergoes multiple color changes before...
Study oxidation-reduction, electrolysis and acid-base reactions as Universal Indicator is added to an aqueous sodium sulfate solution. When two carbon electrodes are connected to a battery and placed in the...
Allow students to learn about polymers and cross-linking using this fun and colorful activity. Students add a solution of sodium alginate to three calcium chloride solutions, each containing a different...
Many people think that all acids are the same. Often times when students hear the phrases strong acid and weak acid they will confuse these concepts with high/low concentration of...
Demonstrate the wonderful, super absorbent properties of a polymer while making snow in your classroom. As the hydrophilic polymer instantly absorbs water, it will expand to over 40 times its...
In this demonstration, students will observe an example of a chemiluminescence reaction. Instant light powder and water are placed in a beaker producing a blue light. This demonstration is designed...
Create your own fluorescent polymers (Slime) in this great classroom demonstration. Mixture is pink under regular light and glows orange under a black light. Included pigment will make this polymer...
In this lab a thionin-iron solution is prepared. Exposing the solution to light energy causes the colored thionin to be reduced by iron (II) ions, resulting in a clear solution....
Several liquids of varying color are added to a cylinder. Due to differing densities of the liquids, a density gradient is formed resulting in a layered, multi-colored column. As an...
Introduce chemical reaction types. This is a patriotic demonstration that illustrates complex ion formation, double replacement while introducing chemical reaction types.
Study acid base indicators and complex ions. Mixing three colored chemical solutions results in another wine colored solution. Adding the fourth chemical of sodium fluoride turns the solution clear.
Hydrogen peroxide is added to a solution of sodium potassium tartrate and heated. Copper sulfate solution is added and the solution turns light blue. With continued heating the solution foams...
Calcium carbide is placed in a cylinder containing water. A reaction occurs producing acetylene gas bubbles. A plastic tube from a chlorine gas generator is placed in the cylinder. As...
A small amount of potassium permanganate is placed in a petri dish. A few drops of glycerin are added and after a few seconds, a puff of smoke and violet...
A small amount of potassium permanganate is placed in a petri dish. A few drops of glycerin are added and after a few seconds, a puff of smoke and violet...
For this demonstration, add hydrogen peroxide to a colorless solution of potassium iodide to produce a red color, or you can add the hydrogen peroxide to a purple solution of...
You will be able to demonstrate the principles of a redox reaction. Paint the potassium thiocyanate solution and potassium ferrocyanide solution onto a filter paper. Once they are dry you...
Make your own foam and explain how when two viscous liquids are mixed together, they initiate a reaction producing a light weight polyurethane foam which expands to 30 times the...
Explain how there are exceptions to the rules of chemistry. Heat a solution and watch it form a precipitate. Watch it go back into solution as it cools.
Construct a simple wet cell battery. When complete it will generate 1.5 volts for 20-30 minutes. Several cells can be connected in series to increase the voltage or in parallel...
Explain and view chemiluminescence. Observe how luminol is converted to an excited state in the presence of an oxidizer such as hydrogen peroxide. As the excited state molecule decays or...
Explain the principle of high surface tension as water acts like a membrane stretched across the surface preventing the sulfur particles from sinking. A wetting agent lowers the surface tension...
Show an example of polymer chemistry. Make your own nylon which is a synthetic compound of high molecular weight that consists of up to millions of repeated chemical units that...
Show an example of polymer chemistry. Make your own nylon which is a synthetic compound of high molecular weight that consists of up to millions of repeated chemical units that...
TLC is a technique of separation chemistry, which provides a simple, rapid method of separating small amounts of compounds. A mixture of three dyes is prepared and then separated on...
Show how the first synthetic rubber was made in United States by a reaction of sodium polysulfide with ethylene chloride. This produces a simple condensation polymer consisting of repeating units...
Discover the principle of oxidation-reduction. Compounds that change color as a result of a change in their pH or oxidation state are called indicators. Illustrate this principle by mixing potassium...
Study both processes of endothermic and exothermic reactions. Reactions are safely carried out in plastic bags. The students can pass the bags around to feel the results of the reactions.
Study the process of endothermic reactions. The reaction is safely carried out in a plastic bag. The students can pass the bag around to feel the result of the reaction.