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Oscillating Chemical Reactions - Inside Mines

Oscillating Chemical Reactions [modified from an article by Earle S. Scott, Rodney Schreiner, Lee R. Sharpe, Bassam , and Glen E. Dirreen]IntroductionOscillating Reactions are among the most fascinating of Chemical Reactions . In one type of reaction,a mixture of chemicals goes through a sequence of color changes, and this sequence repeatsperiodically. In another, the mixture periodically emits a burst of gas, foaming up. To many, Oscillating Reactions are engaging examples of " Chemical magic." To those having someacquaintance with chemistry, these Reactions are a mystery and a challenge. To everyone, they arememorable demonstrations of the wonder of what makes Oscillating Reactions so fascinating to chemists is that they seem to contradictcommon sense. Experience tells us that, under a given set of conditions, Chemical Reactions go inonly one direction. We rarely find a Chemical reaction that appears to reverse itself, much less to doso repeatedly.

Wet Lab 3 / p.6 PROCEDURE Materials 3 liters distilled water 410 mL 30% hydrogen peroxide, H 2O 2 43 g potassium iodate, KIO 3 4.3 mL concentrated (18M) sulfuric acid, H 2SO 4 16 g malonic acid, CH 2(CO 2H) 2 3.4 g manganese(II) sulfate monohydrate, MnSO 4•H 2O 0.3 g soluble starch

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  Chemical, Acid, Reactions, Oscillating, Oscillating chemical reactions

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