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The White Powder Mystery

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Submitted By fribess
Words 361
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The purpose of this experiment is to figure out who sabotaged Luigi’s cake with a mystery substance. The way we did this was by testing the multiple mystery powders to see there reactions to vinegar, iodine, and heat. The vinegar tests for the presence of acid, the iodine tests for the presence of starch, and heat to test for burning point. The items needed to complete this lab are a Bunsen burner, tin foil, plastic film, iodine, vinegar, baby powder, baking powder, baking soda, flour, corn starch, and powder sugar. I believe that toad sabotaged Luigi’s cake because no one suspects the toad.
1) You need to gather all the materials. Including mystery substances 1-6
2) Put mystery powder 1 on the plastic film in two piles, and test its reaction to vinegar then to iodine. Repeat this for mystery powders 2-6.
3) Record results
4) Make 6 small bowls out of the tin foil to hold the mystery powders.
5) Connect the Bunsen burner hose.
6) Turn on the gas and light with a striker.
7) Hold the tin foil bowls with the mystery powders in them with tongs, and then move the bowls over the flame for 20 to 30 seconds.
8) Record results Observations Vinegar Iodine Heat
A White powder, Blue tint No Fizz No reaction Burned around edges
B White powder, fine, clumps together Fizz Reaction Smokes, burns edges
C fine powder, clumps Fizz No reaction No heating reaction
D clumps, yellow tint, soft No Fizz Reaction Very quick reaction, Flames
E very soft, very fine No Fizz Reaction Caught on fire early
F clumps, fine powder No Fizz No reaction Melted but no burn till later
G Fine powder, course Fizz Reaction No heating reaction

In this experiment we got different results from the rest of the groups, but that was because my group was in a dark corner and was difficult to determine if iodine had a reaction. We did not need to vary from the procedures because they were clear

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