secret_message - Secret Messages Secret TimeEstimate:...

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Secret Messages Secret Messages Time Estimate: 5 minutes Materials: paper phenolphthalein solution* vinegar in a spray bottle Windex (with ammonia) in a spray bottle small paintbrush Advance Preparation: *Phenolphthalein solution: 0.1 g of phenolphthalein in 10 mL of ethanol or  isopropanol “Paint” a picture or message on the paper using the paintbrush and the  phenolphthalein solution. Be creative and fun! i.e. UF Chemistry, Chemistry is  Colorful, etc.  Allow the paper to dry. Procedure: Spray the paper with the vinegar.  Let the paper dry.  Spray the paper with the  Windex and watch the message appear.  Let the paper dry and watch the  message disappear. Questions to Ask: Secret Messages 1
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(Before Experiment) What do you see on the piece of paper? Have you ever used vinegar in the kitchen? What does it smell like? Have you ever used Windex to clean windows? What does it smell like?
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This note was uploaded on 09/18/2011 for the course CHM 3218 taught by Professor Stewart during the Spring '08 term at University of Florida.

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secret_message - Secret Messages Secret TimeEstimate:...

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