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Reactions, Microscale: Precipitation Here we show two precipitation reactions under a microscope. They are potassium dichromate crystal with silver nitrate and potassium iodide with lead nitrate.
Precipitation / Solubility |
Reactions
Reaction, Microscale: Potassium Dichromate with Silver Nitrate A crystal of potassium dichromate is carefully combined with a solution of silver nitrate under a microscope. The reaction takes some time, so it is shown in a series of seven sequential videos. To see the entire reaction you need to play all seven.
The Chemistry of Art and the Art of ChemistryC. Kafetzopoulos, N. Spyrellis, and A. Lymperopoulou-Karaliota Examines the relationship between chemistry and art, particularly in the area of painting, where the mixing of salt solutions leads to the preparation of colored products. Kafetzopoulos, C.; Spyrellis, N.; Lymperopoulou-Karaliota, A. J. Chem. Educ.2006, 83, 1484.
Dyes / Pigments |
Metals |
Precipitation / Solubility |
Qualitative Analysis
The Ultrasonic Soda Fountain: A Dramatic Demonstration of Gas Solubility in Aqueous SolutionsJohn E. Baur and Melinda B. Baur An ultrasonic bath is used to accelerate the rate at which carbonated beverages equilibrate with the atmosphere. The resulting fountain, which can reach heights in excess of 3 meters, is a dramatic demonstration of the solubility of gases in liquids. Baur, John E.; Baur, Melinda B. J. Chem. Educ.2006, 83, 577.
Aqueous Solution Chemistry |
Kinetics |
Physical Properties |
Solutions / Solvents |
Precipitation / Solubility
A flotation method for growing large single crystalsFischinger, Andrew J. Presents an alternative to growing large single crystals by suspending them from a string in saturated solution. Fischinger, Andrew J. J. Chem. Educ.1969, 46, 486.
Crystals / Crystallography |
Laboratory Equipment / Apparatus |
Precipitation / Solubility |
Aqueous Solution Chemistry |
Solutions / Solvents
ACS Resources: First 3 results
Bubble Trouble In this activity students investigate the effect of hard water on soap. They compare soap in water with soap in water plus Epsom salt. Epsom salt is made of a chemical called magnesium sulfate. When magnesium sulfate is dissolved in water and added to soapy water, the magnesium combines with the soap. This combination is actually a new substance that doesn't dissolve well in water. The common name for this substance is soap scum. Since it can't dissolve in water, the soap in the soap scum can't get back into the water and can't make bubbles.
Precipitation / Solubility |
Solutions / Solvents
Caves ? the Hole Story Many caves are formed when water erodes limestone rock. In this activity, students use clay and sugar cubes to model cave formation, which is based on some types of rock being more soluble than others.
Geochemistry |
Precipitation / Solubility
Crystal Stencil Stars In this activity, students use a saturated solution of Epson salts to make artistic stars. The star shapes are cut from paper and painted with the saturated solution. As the solution dries, the Epson salts recrystalize, creating beautiful crystals all over the surface.
Solubility and Molecular StructureEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.
