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Exploding Soap Bubbles: Hydrogen + Oxygen A series of three videos shows that as the ratio of oxygen to hydrogen in soap bubbles increases, the explosions that occur when the bubbles are ignited get louder. (The fact that with an excess of oxygen the explosions would become softer again is not shown.) Each video is repeated with no voice-over so that only the sounds of the explosions are heard. Five still images are provided to show the stoichiometry on the molecular scale. The videos are intended to be shown in order beginning with Hydrogen Alone and ending with hydrogen plus more oxygen.
Electron Transport WordsearchTerry L. Helser Wordsearch puzzle containing 30 words that describe electron transport and oxidative phosphorylation. Helser, Terry L. J. Chem. Educ.2003, 80, 419.
Metabolism |
Nomenclature / Units / Symbols |
Enrichment / Review Materials
Methemoglobinemia: An illness caused by the ferric stateSenozan, N. M. Hemoglobin's ability to carry oxygen depends on the iron being in the +2 state; methemoglobinemia involves the oxidation of hemoglobin iron to the +3 state. Senozan, N. M. J. Chem. Educ.1985, 62, 181.
Proteins / Peptides |
Enzymes |
Medicinal Chemistry |
Oxidation / Reduction |
Oxidation State
ATP synthesis: The current controversyDeamer, David W. The mechanisms by which ATP is utilized in the important processes of muscle contraction and ion transport are not at all clear; the controversy over the mechanism of phosphorylation offers insight into the style of modern biochemical research. Deamer, David W. J. Chem. Educ.1969, 46, 198.
Go for the oxidation of 2 mole of silver in the following balanced reaction. 
Ca(s) + 2AgI(s) 
