Transcript Crime Busters

Science Crime Busters
FLOW CHART
NaCl, NaHCO3, CaSO4, CaCO3, NaC2H3O2, sugar, sand, Vitamin C
(ascorbic acid), cornstarch, flour, yeast, gelatin, Alka Seltzer
Water
Insoluble
Go On
Soluble
Go On
Swells

Gelatin
Bubbles
Cloudy/odor


Alka
Seltzer
Yeast
Gelatin
Go Back
Go Back
Alka Seltzer
Yeast
Go Back
Insoluble
KI3
Deep Blue
Nothing
Observe Color Before Adding KI3, or
Observe Mixture Dissolution
Off White
Flour
Pure White

Corn Starch
Brown/Tan/ Yellowish

Add Vinegar
(Acid)
Bubbles
Limestone
No Bubbles

Plaster of
Paris
Sand
Go On
Go On
Go Back
Flour
Go On
Cornstarch
Flour
Go Back
Cornstarch
No Bubbles
CaSO4
Go Back
Bubbles
CaCO3
Soluble/ Clear Solution
pH paper
Base
Add Vinegar (acid)
Bubbles
Bicarbonate
of soda
No Bubbles

Sodium
Acetate
Acid
Neutral

Observe Crystals
Vitamin C
Hexagonal
Sugar
Cubic

Salt
Vitamin C
Go On
Go On
Go Back
Sodium Acetate
Go Back
Sodium Bicarbonate
Sugar
Go On
Sodium Chloride
Go On
Metals
Appearance
Silvery
Gray or
Black
Silvery
or Gray
Silvery
or Gray
Yellow-orange

Cu
Magnet
None
None
None

HCl
bubbles

Zn
Attraction
Fe
none
none
Use density test or
tin more malleable than
aluminum
Jack Cairns
Director
Delaware Science Resource
Center
Co-Director
Science Olympiad
[email protected]