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With the Foiled Again! Single Replacement Reaction—ChemTopic™ Lab Activity, watch aluminum foil disappear as it is added to a solution of copper(II) chloride. Observe color changes, production of a gas, formation of a solid metal and a drastic change in temperature as you learn about the unexpected role of a catalyst in a single replacement reaction on a metal surface. Available as part of the Chemical Reactions—ChemTopic™ Labs digital collection. Click the Price link for digital collection pricing.