Cooking Show Surprise
Woody and Buzz Lightyear host a cooking show, and wanted a guest star to be on an episode. Each auditioner had to prepare: A hot dog, a wrap for the hot dog, a drink, and a mystery white powder for dessert.
One of the auditioners must have felt a little jealous of Buzz because he had his own show, so they poisoned him! He is currently in the hospital, and its up to you to figure out who did it!
Items left at the crime scene…
A piece of hot dog 5 piles of white powder on the
ground Two pieces of bent metal on the
ground (one in a circular shape, one in an ‘s’ shape)
175 mL of clear liquid An outline of Buzz, with his hands on
his hips
Suspect Drink Wrap Powder Hot Dog
Wicked Witch Water Zinc Ascorbic acid Fat free
Snow White Alcohol Sulfur Ascorbic acid Light pork
Daffy Duck Grape drink Plastic Sodium polyacrylate Pork
Shrek Water Iron Sucrose Fat free
Dorothy Salt water Aluminum Baking soda Pork
Princess Leia Vinegar Iron Ascorbic acid Light pork
Harry Potter Lemonade Copper Sucrose Light pork
Jimmy Neutron Water Iron Sodium polyacrylate Pork
Icky Vicky Vinegar Aluminum Ascorbic acid Light pork
Darth Vader Salt water Aluminum Sodium chloride Fat free
Lord Voldemort Salt water Zinc Baking soda Fat free
Goofy Alcohol Copper Sodium chloride Pork
Ariel Water Iron Sucrose Pork
Ursula Alcohol Plastic Sodium polyacrylate Fat free
Donkey Vinegar Copper Sodium chloride Light pork
Prince Charming Salt water Aluminum Baking soda Fat free
Nancy Drew Salt water Iron Sodium chloride Pork
Sponge Bob Water Zinc Sucrose Pork
Dora Salt water Zinc Baking soda Light pork
Luke Skywalker Salt water Aluminum Sodium polyacrylate Fat free
Hypothesis
If Prince Charming prepared salt water, an aluminum wrap, baking soda, and a fat free hot dog, then he poisoned Buzz, because the items he prepared appeared to match the items at the crime scene.
What to do
First, perform a series of tests to gather information about all of the properties of drinks, wraps, hot dogs, and powders.
Once all of the information is gathered, you will perform the same tests on the items left at the crime scene
You will then compare the results, and figure out who did it!
Materials- Drinks
To test for Color, Conductivity, Density, Optical Properties, Flammability, and Reactivity, you will need:
• A glass graduated cylinder • A medium glass beaker
• 6 matches • A conductivity meter
• A plastic well plate • A hand lens
• Sodium Bicarbonate (baking soda)
• Samples of each drink (pure water, alcohol, salt water, grape drink, vinegar, and lemonade with pulp).
Materials- Wraps
To test for Malleability, Luster, Conductivity, Texture, and Reactivity, you will need: • A plastic well plate • Baking soda
• A dropper • A hand lens• Hydrochloric acid • A conductivity meter• A small plastic container
• Samples of the 6 wraps (plastic, aluminum, zinc, copper, iron, and sulfur)
Materials- powders To test for Solubility, Flammability,
Conductivity, Reactivity, and Melting, you will need:• A paper cup • A medium glass beaker
• Water • A conductivity meter• A plastic well plate • A hand lens • A burner • Aluminum foil
• 5 matches • Vinegar
• A glass stirrer • Samples of each powder (sucrose-sugar, baking soda, sodium polyacrylate, ascorbic acid, and sodium chloride)
Materials- Hot Dog
To test for Mass (pre-squeeze and post-squeeze), Density, Conductivity, and Reactivity, you will need:• 3 paper towels • Iodine • Water • A conductivity meter• A plastic well plate • A hand lens • A plastic graduated cylinder • A triple beam balance
• 5 matches • Vinegar• A dropper • Samples of each hot
dog (pork, fat free, and light pork)
Procedure- Drinks
1. Put a few drops of grape drink in your well plate 2. Record the color and optical properties of the drink (transparent,
translucent, or opaque)3. To test for conductivity, turn on the conductivity meter4. Place the exposed ends of the conductivity meter into the liquid,
making sure that the two metal pieces are not touching each other nor are they touching the bottom of the well plate.
5. The lights of the conductivity meter will glow which allows you to see how conductible the liquid is.
6. Use this chart to determine conductivity of the liquid:
Red: Green: Conductivity level:
off off none
light off low
medium low medium
bright medium high
very bright bright very high
Procedures- Drinks (continued)7. Record the conductivity level of the grape
drink8. Dry the meter off and put it away9. To measure density of the liquid, take a glass
graduated cylinder and fill it with water up to 10 mL
10. Take a dropper and put 3 to 4 drops of grape drink in the water (do not use the grape drink from the well plate!). See if it sinks to the bottom of the graduated cylinder, or if it floats above the water (you might have to wait for a few minutes)
11. Record whether it floats or sinks in water12. Dump out your graduated cylinder and put it
away
Procedures- drinks (continued)13. To test for reactivity, get out a plastic spoon and the
sodium bicarbonate (baking soda)14. Place a small amount of sodium bicarbonate in the grape
drink that is already in your well plate.15. Using the hand lens, observe what happens to the
mixture16. Record what happens17. Dump out the drink that is in the well plate18. To test for flammability, fill a glass beaker about a quarter
full with the grape drink19. Light a match and touch it to the drink20. Record whether it catches on fire or not21. Dump the grape drink out and throw the match away22. Put the graduated cylinder away
Repeat steps 1-22 with each of the other 5 drinks
Baking Soda
Procedures- Wraps
1. Put a small piece of iron in a well plate2. Record whether it is dull or shiny, and the
texture. 3. Record whether it is very thin (malleable) or
thick (nonmalleable)4. To test for conductivity, get the conductivity
meter and test its conductivity by placing the exposed ends of the conductivity meter onto the iron, making sure that the two metal pieces are not touching each other nor are they touching the bottom of the well plate.
5. See chart on slide 12 to determine conductivity level
6. Record the conductivity level
Procedures- wraps (continued)7. To test for reactivity, get out the hydrochloric acid
and dropper- CAUTION: HYDROCHLORIC ACID CAN EAT THROUGH SKIN AND BONE, AND IS DANGEROUS IF TOO MUCH IS INHALED OR DIGESTED.
8. Place a few drops of hydrochloric acid onto the iron and watch what happens using the hand lens
9. Record what happens to the iron10. To get rid of the hydrochloric acid, get out your
plastic container and fill it about a quarter full with baking soda
11. Pour the iron and the hydrochloric acid into the container (baking soda absorbs hydrochloric acid!)
Repeat steps 1-11 with the other 5 wraps
Procedures- powders
1. Put a small spoonful of Baking soda into your well plate
2. To test for reactivity, using a dropper, put about three drops of vinegar onto the baking soda
3. Using the hand lens, watch what happens and record it
4. Dump out the baking soda mixture5. To test for flammability, put a small spoonful of
Baking soda into your well plate6. Light a match and put it onto the baking soda,
and record whether it catches on fire or not7. Dump out your baking soda and throw away the
match8. Put your well plate away
Procedures- powder (cont.)9. To test whether the powder will melt, turn on your burner and put a spoonful
of baking soda onto a piece of aluminum foil; put the aluminum foil on the burner
10. Once the burner is hot, record if the baking soda melts or not11. Turn off your burner and clean everything up
During our experiment, while the Burner was heating up, we also tested for solubility.
12. To test for solubility, get the medium-sized beaker and fill it halfway with water
13. Pour a spoonful of baking soda into the water, and stir it with the glass stirrer for one minute
14. Record whether or not the baking soda dissolved in the water15. To test the conductivity of the powder, we used the baking soda-water
mixture used in the solubility test. 16. To test for conductivity, get the conductivity meter and test its conductivity
by placing the exposed ends of the conductivity meter into the mixture, making sure that the two metal pieces are not touching each other nor are they touching the bottom of the beaker.
17. See chart on slide 12 to determine conductivity level18. Record the conductivity level
Repeat steps 1-18 with the other 4 powders, EXCEPT for SODIUM POLYACRYLATE
Exception: sodium polyacrylate
Flammability and melting can be conducted the same way as the other powders, but, when testing reactivity, solubility and conductivity of sodium polyacrylate, put the sodium polyacrylate into a paper cup that you can throw away. DO NOT PUT SODIUM POLYACRYLATE DOWN THE SINK!
Sodium Polyacrylate
Procedures: hot dog 1. Put a piece of pork hot dog into your well plate2. To record the mass of the hot dog ‘pre-squeeze’, use a
triple beam balance 3. Put the hot dog on the triple beam balance and measure
the mass of your hot dog, then record. Clean off your triple beam balance, then put it away
4. To find the volume of the hot dog, take a plastic graduated cylinder, and fill it with 50 mL of water
5. Drop the hot dog into the water, and see how many mL the water raised. Subtract 50 mL from the new volume (water + hot dog), and you have the volume of the hot dog
6. Divide mass found in step 3 by volume found in step 5 and record the answer. This is your density.
7. Dump out your cylinder, but keep the hot dog. Put the cylinder away
Procedures- hot dog (continued)8. To find out how much fat is in a hot dog, get out a paper towel,
wrap it around the hot dog and squeeze the hot dog as much as you can
9. Keep all of the pieces of the hot dog on the paper towel
Note: During our experiment, we tore the hot dog in half to make it easier to squeeze
10. To find the mass of the hot dog ‘post squeeze’, take the bits of hot dog off of the paper towel and find the mass of the pieces by using the triple beam balance as in step 3. Record the post squeeze mass.
11. Take the pieces off of the balance, and clean the balance. Put the hot dog parts into your well plate.
12. To test the conductivity of the hot dog - put the ends of the conductivity meter into the meat part of the hot dog, not the skin. Record conductivity level. See chart on slide 12.
Procedures- hot dog (continued)
13. To test for reactivity, get out the iodine and a dropper
14. Put one or two drops of iodine on the hot dog (try to put the drops on the meat, not the skin!), and record any changes of color (it will be immediate)
Repeat steps 1-14 with the other 2 types of hot dogs
Data- Drinks
Drink: Color: Conductivity: Density:Optical Properties: Flammability: Reactivity:
Pure Water Clear low same transparent no little bubbles
Alcohol Clear low/none float transparent yes nothing
Salt Water Clear very high sink transparent no nothing
Grape Drink Purple low sink translucent no nothing
Vinegar Clear low float transparent nofizzing and
bubbles
Lemonade with Pulp
Almost clear- a
little yellow medium sink translucent no a little bubbling
Data- Drinks
Drink ObservationsPure Substance/
Mixture
Mixture: Heterogeneous/Homogeneous
Pure Substance: Compound/ Element
Water Clear Pure Substance N/A compound
Alcohol Clear Mixture homogeneous N/A
Salt Water Clear Mixture homogeneous N/A
Vinegar Smells Bad, Clear mixture homogeneous N/A
Grape DrinkPurple, smells like
Grapes Mixture homogeneous N/A
Lemonade with Pulp
Yellowish, not completely clear,
little pulps floating inside Mixture homogeneous N/A
Data- Wraps
Wraps: Malleability: Luster: Conductivity: Texture: Reactivity:
Plastic yes dull none wrinkly none
Aluminum yes shiny very high smooth none
Zinc yes shiny very high smooth none
Copper yes shiny very high smooth none
Iron yes shiny very high smooth tiny bubbles
Sulfur no dull none smooth/crumbly none
Data- Wraps
Wrap ObservationsPure Substance/
Mixture
Mixture: homogeneous/heterogene
ousPure Substance:
Compound/Element
Plastic Purple, wrinkly Mixture homogeneous N/A
Aluminum silver, shiny Pure Substance N/A element
Zinc silver, shiny Pure Substance N/A element
Ironsilver, shiny, with a piece
missing Pure Substance N/A element
Copper penny colored, shiny Pure Substance N/A element
Sulfur crumbly, yellow Pure Substance N/A element
Data- Powders
Powder: Solubility: Flammability: Conductivity: Reactivity: Melting:
Sucrose yes no medium none yes
Baking Soda yes no high bubbles and fizzes no
Sodium Polyacrylate yes no highExpands into a soft, snow-like material no
Ascorbic Acid yes no high 3 large bubbles yes
Sodium Chloride yes no very high none no
Data- Powders
Powder ObservationsPure Substance/
Mixture
Mixture: homogeneous/heterogeneo
usPure Substance:
Compound/Element
SucroseWhite, aka sugar, smells
good when melted Pure Substance N/A Compound
Baking SodaWhite, fizzes when reacted
with vinegar Pure Substance N/A Compound
Sodium Polyacrylate White, puffs up when it
touches a liquid Pure Substance N/A Compound
Ascorbic Acid orange-y, clumpy Pure Substance N/A Compound
Sodium Chloride table salt, white Pure Substance N/A Compound
Data- Hot Dogs
Hot Dog: Pre-Squeeze: Post-Squeeze: Density: Conductivity: Reactivity:
Pork 11 grams 8.5 grams 1.2 g/mL highturns dark
brown/purple/gray
Light Pork 12 grams 10.5 grams 1.4 g/mL very high none
Fat Free 9.5 grams 8.5 grams 1.3 g/mL very high turns dark brown
Data- Hot Dogs
Mass of Hot Dogs
0
2
4
6
8
10
12
14
Pork Light Pork Fat Free
Type of Hot Dog
Mas
s o
f H
ot
Do
g
Pre-Sqeeze Mass
Post-Squeeze Mass
Data- Hot Dogs
Hot Dog Observations
Pure Substance/
Mixture
Mixture: homogeneous/h
eterogeneous
Pure Substance:
Compound/Element
Pork Lightest Skin mixture Homogeneous N/A
Light Pork Speckled Skin mixture Homogeneous N/A
98% Fat Free Orange-ish mixture Homogeneous N/A
Crime Scene Items
After completing these tests, the same tests were performed on each of the items left at the crime scene.
The data of the crime scene items were then compared to the data obtained previously.
Crime Scene DataHot Dog: Pre- Squeeze:
Post- Squeeze: Density: Conductivity: Reactivity:
Crime Scene 8.5 7.5 1.7 highdark brown/ gray/purple
Powder: Solubility: Flammability: Conductivity: Reactivity: Melting:
Crime Scene yes no medium none yes
Wraps: Malleability: Luster: Conductivity: Texture: Reactivity:
Crime Scence yes shiny very high smooth tiny bubbles
Drink: Color: Conductivity: Density:Optical
Properties: Flammability: Reactivity:
Crime Scene clear low same transparent no none
Conclusion
According to the data, the items at the crime scene were: water, an iron wrap, sucrose, and a pork hot dog.
The Iodine (reactivity) test performed on the crime scene hotdog showed that a Pork hot dog was prepared.
The density test performed on the crime scene liquid, showed that the liquid prepared was water.
The melting test performed on the crime scene powder showed that the powder used was Sucrose.
The reactivity test (Hydrochloric Acid) performed on the crime scene metal showed that it was Iron.
Conclusion
Original Hypothesis: Prince Charming poisoned Buzz because the foods he prepared appeared to match the items left at the crime scene.
The data showed the hypothesis was incorrect.
Based on these results, Ariel poisoned Buzz.
Interesting trends, patterns, etc.
For the experiments used during this investigation, all of the Metal wraps (iron, zinc, aluminum, and copper) had pretty much the same data
Conclusions: Limitations
Some limitations to the experiment:Time-could not repeat trials because of time limits
Conclusions: Flaws
The temperature of the burners was not recorded and melting points may not have been reached
Poison Article
http://ezinearticles.com/?The-Poison-Pellet-Murder&id=3802336
References
http://upload.wikimedia.org/wikipedia/commons/3/3a/4mmc.png
http://upload.wikimedia.org/wikipedia/commons/1/14/Graduated_cylinder.jpg
http://upload.wikimedia.org/wikipedia/commons/8/81/Sodium_bicarbonate.jpg
http://upload.wikimedia.org/wikipedia/commons/c/c0/Iodine_trichloride.JPG
http://fc96.deviantart.com/fs45/i/2009/126/c/3/Ariel_by_Norm27.jpg