This document provides instructions for a chemistry lab involving testing unknown powder samples. Students are asked to: 1) Perform a series of tests (sensory observations, solubility, iodine, vinegar, heat) on 5 known powder samples and record results. 2) Use the evidence from the tests to determine the identities of 2 unknown powders in a sample bag. 3) Explain their reasoning for the identifications and turn in their lab sheet. Proper lab clean-up and binder/note submission are also required.

1. You will Need:
Pencil,
Log #4 – update w/ graded
paper points
d Table completely cleared
off
CSI Mystery Powder Lab –
Passed out last week

2. Friday, June 1st
• On-line Component
• ½ page of notes – What to Know for
the Chemistry Final
• Binder Check #4
1. Due at the beginning of class
Monday, June 4th
1. Test Part 2 Written
Tuesday, June 5th
• Test Part 2-3rd Period ONLY

3. 1. A substance transitioning from a solid to a gas
w/out becoming a liquid is called?
2. The state of matter made up a attached and
organized repeating patterns of atoms?
3. The most abundant form of matter in the
universe is?
4. Which state(s) of matter usually do not have the
shape of their container?
5. If your mass on Earth is 54 kg, your mass on the
moon would be close to?

4. • In order slow down a chemical reaction a
scientist may use a ________________.
• Isotopes of the same element are different
because?
• The substance in a mixture that has the most
quantity would be called the?
• Atoms are never lost or gained during a
chemical reaction. They are just ___________.
• A neutral atom of Oxygen has 8 protons and
10 neutrons. How many electrons does it
have? Why?

5. 1. Give any example of a heterogeneous mixture.
• How can you neutralize a substance with a pH of
9? (give two ways)
• Ductility is the ability of a metal to do what?
4. Types of elements that tend to gain electrons are
which type?
• A bond formed when atoms transfer electrons is
a(n) _______________ bond.
• What type of ION is present in bases?
• The majority of the volume in an atom is found
where?
• The most active nonmetals on the periodic table
are the ___________________.

6. • Long Hair MUST be tied back
• Loose sleeves, bracelets must
be pushed up or removed.
• Appropriate Lab Behavior
• Consequence = Book Work-
See Side Board

7. Bla
Sil ck
k
Sm y
Ro ooth St ic
Ha ugh Bla k y Iodine
rd
Cru Silk ck Vinegar
Ru nchy Sm y
bb
Mi
lky ery Ro ooth Check
So u
ft Ha gh out
Gr r
ay Cru d
Ye
llow Ru nchy
Bri b
gh Mil bery
Cry t k
Wh sta So y
f
Da ite lline Gra t Magnifier
Bla rk Ye y
l
Sil ck Bri low
ky Flour
g
Cry ht
mo Wh stallin
Stir Sticks (4)
oth
ug
h Da ite e
rk
d Bla
hy Silk c k
Sm y
Ro ooth
u
Ro gh
u
Op gh
a
B r que
igh
t
Solubility Tray- leave out Testing Trays
of big bag (2)

8. • Problem: Scientific Results must
be kept free of
contamination…..so…..
• Do Not DOUBLE DIP!!!!!
• Clean your hands each time you
use a new powder!!!!!
• Stir sticks should be trimmed
when contaminated.

9. Test Powder Powder Powder Powder Powder
#1 #2 #3 #4 #5
Sugar Flour Baking Corn Salt
Soda Starch
Senses
Sound,
Sight,
Touch 3 unique bullets for each
Smell (waft) square – one simile
Solubility
The ability Get Mrs. M.’s Signature
to
dissolve, after finishing 2 complete
(blend) in
water
tests

10. Test Powder Powder Powder Powder Powder
#1 #2 #3 #4 #5
Sugar Flour Baking Corn Salt
Soda Starch
Iodine
Pinch +3
DROPS
3 unique bullets for each
square – 1 simile
Vinegar
Get Mrs. M.’s Signature
Pinch + 3
DROPS after finishing 2 complete
tests

11. You will need:
• Matches Check Out
• Bunsen Burner
• Cooking Table Clean screen when done
• 5 pieces of foil Throw away after test
Apply Heat only until it starts to smoke
• Get your third signature when
you’ve completed Heat Test +
Comparison

12. You will need:
• Do the same 5 tests on your mystery
bag powders
• Based on evidence, determine the 2
powders in your bag
• Tell WHY you believe it to be those 2
powders….give evidence why it is the
powder and why it is not the other
powders
Turn in your lab sheet and Organize Binder
#4 or Create ½ page of notes

13. Bla
Sil ck
k
Sm y
Ro ooth St ic
Ha ugh Bla k y Iodine
rd
Cru Silk ck Vinegar
Ru nchy Sm y
bb
Mi
lky ery Ro ooth Check
So u
ft Ha gh out
Gr r
ay Cru d
Ye
llow Ru nchy
Bri b
gh Mil bery
Cry t k
Wh sta So y
f
Da ite lline Gra t Magnifier
Bla rk Ye y
l
Sil ck Bri low
ky Flour
g
Cry ht
mo Wh stallin
Stir Sticks (4)
oth
ug
h Da ite e
rk
d Bla
hy Silk c k
Sm y
Ro ooth
u
Ro gh
u
Op gh
a
B r que
igh
t
Solubility Tray- leave out Testing Trays
of big bag (2)

14. -10 points will be taken for unclean labs
• Sinks clean
• Counters & Table Tops Clean & Dry
• DO NOT sweep powders onto floors
• DRY the inside of the Supply Bag
(Testing Equipment)
• Powder Bags stacked straight up
inside Large Zip Lock Bag
Let Me Know if supplies need to be
added/changed

15. • Binder Check #4 –Due
Friday, June 1st
• ½ page of notes for Final
Exam – Due Friday, June
1st