Download Mystery Mixture Case #14 - A Recipe for Disaster

MYSTERY MIXTURE CASE #14
A RECIPE FOR DISASTER?
Each fall Mrs. Merry makes a batch of her sugar
cookies to give to all the good boys and girls in
her neighborhood. However, a bad little boy
named Norris McNaughty snuck into her kitchen
and mixed up all of her special baking powders!
Norris left 3 large piles, each containing a different
mixture of her powders.
The Scientific Bureau of Investigation (SBI) has
provided you with samples of 4 individual powders
found in Mrs. Merry’s kitchen and the 3 mixed up
piles left by Norris. Help her find the right mixture
needed in her famous sugar cookie recipe (see
right).
Mrs. Merry’s Sugar Cookie
Recipe





15 cups of white flour
5 cups of powdered sugar
10 teaspoons of baking soda
5 cups of butter
5 eggs
Mix all ingredients in a large
bowl. Roll onto flat surface
and cut into cookie shapes.
Bake at 175oC for 6-8 minutes
or until golden brown.
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Testing the Sample Powders –
Baking Soda
1. Using a scoop, place 3 small piles of
baking soda in three wells down a column.
Make sure each pile is roughly the size of
a pea). See the diagram below for help
2. Examine the physical properties of the
powder and record at least 3 observations
in the data table.
Testing the Sample
Powders –
Baking Soda
3.
Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Testing the Sample
Powders –
Baking Soda
6. For the HEAT test, place the
candle on the table and light it
using the lighter
7. Place a small amount of
powder on the aluminum foil
square. Using tweezers, hold
the sample over the candle
flame for 5-10 seconds. Record
your observations.
Testing the Sample Powders –
Flour
1. Using a scoop, place 3 small piles of flour
in the next three wells down a column.
Make sure each pile is roughly the size of
a pea). See the diagram below for help
2. Examine the physical properties of the
powder and record at least 3 observations
in the data table.
Testing the Sample
Powders –
Flour
3.
Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Testing the Sample
Powders –
Flour
6. For the HEAT test, Place a
small amount of flour on the
aluminum foil square. Using
tweezers, hold the sample over
the candle flame for 5-10
seconds. Record your
observations.
Testing the Sample Powders –
Baby Powder
1. Using a scoop, place 3 small piles of baby
Powder in the next three wells down a
column. Make sure each pile is roughly
the size of a pea). See the diagram below
for help
2. Examine the physical properties of the
powder and record at least 3 observations
in the data table.
Testing the Sample
Powders –
Baby Powder
3.
Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Testing the Sample
Powders –
Baby Powder
6. For the HEAT test, Place a
small amount of baby powder
on the aluminum foil square.
Using tweezers, hold the
sample over the candle flame
for 5-10 seconds. Record your
observations.
Testing the Sample Powders –
Powdered Sugar
1. Using a scoop, place 3 small piles of
powdered sugar in the next three wells
down a column. Make sure each pile is
roughly the size of a pea). See the
diagram below for help
2. Examine the physical properties of the
powder and record at least 3 observations
in the data table.
Testing the Sample
Powders –
Powdered Sugar
3.
Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Testing the Sample
Powders –
Powdered Sugar
6. For the HEAT test, Place a
small amount of Powdered
sugar on the aluminum foil
square. Using tweezers, hold
the sample over the candle
flame for 5-10 seconds. Record
your observations.
Part 2: Testing the 3 Mystery Mixtures
1.Wash out your well plate in the sink. Dry thoroughly
with a paper towel.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #1
2. Using a scoop, place 3 small piles of
Mystery Mixture #1 in the wells down a
column. Make sure each pile is roughly
the size of a pea). See the diagram below
for help
3. Examine the physical properties of
the powder and record at least 3
observations in the data table.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #1
3. Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #1
6. For the HEAT test, Place a
small amount of mystery
mixture #1 on the aluminum
foil square. Using tweezers,
hold the sample over the
candle flame for 5-10 seconds.
Record your observations.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #2
2. Using a scoop, place 3 small piles of
Mystery Mixture #2 in the wells down a
column. Make sure each pile is roughly
the size of a pea). See the diagram below
for help
3. Examine the physical properties of
the powder and record at least 3
observations in the data table.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #2
3. Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #2
6. For the HEAT test, Place a
small amount of mystery
mixture #2 on the aluminum
foil square. Using tweezers,
hold the sample over the
candle flame for 5-10 seconds.
Record your observations.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #3
2. Using a scoop, place 3 small piles of
Mystery Mixture #3 in the wells down a
column. Make sure each pile is roughly
the size of a pea). See the diagram below
for help
3. Examine the physical properties of
the powder and record at least 3
observations in the data table.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #3
3. Add 4 to 5 drops of WATER to the
1st pile and mix with a toothpick. Record
your observations.
4. Add 4 to 5 drops of VINEGAR to the
2nd pile and mix with a toothpick. Record
your observations.
5. Add 4 to 5 drops of IODINE to the 3rd
pile and mix with a toothpick. Record
your observations.
Part 2: Testing the 3
Mystery Mixtures
Mystery Mixture #3
6. For the HEAT test, Place a
small amount of mystery
mixture #3 on the aluminum
foil square. Using tweezers,
hold the sample over the
candle flame for 5-10 seconds.
Record your observations.
Analysis and Conclusion:
-Your data table should now be 100% complete and
filled in.
-Using your data table, determine which mystery
mixture is Mrs. Merry’s special cookie mix.
(Hint: The mix has flour, sugar, and baking
soda in it. Which mystery mixture had
matching reactions for baking soda,
powdered sugar and flour?
-Justify your answer with at least 2
points of evidence. Answer in complete
sentences on your lab sheet
Mrs. Merry’s Sugar Cookie
Recipe
 15 cups of white flour
 5 cups of powdered sugar
 10 teaspoons of baking
soda
 5 cups of butter
 5 eggs
Mix all ingredients in a large
bowl. Roll onto flat surface
and cut into cookie shapes.
Bake at 175oC for 6-8
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minutes
orFrom
untilMicrosoft
golden
brown.