Page 188 - Demo

Practical Applications of Chemistry
Consumer Science
FD&C Food Dyes
Imagine! The entire palette of artificial food colors
is derived from just seven dyes certified by the Food
and Drug Administration for use in foods, drugs, and cosmetics (FD&C). Use these pure, crystalline food dyes as color standards to identify compounds extracted from candy, beverages and other foods. Wonderful for chromatography and spectroscopy lab activities, as well as acid–base indicator reactions and redox experiments! Seven dyes, 2 g each: FD&C Red 3, Red 40, Yellow 5, Yellow 6, Green 3, Blue 1, and Blue 2.
Chemistry of Food Additives—
Multi-Demonstration Kit
By: The Flinn Staff
Is artificial ever beneficial? Consumers often associate food additives as being unhealthy and strictly used for convenience foods. This four- part demonstration allows students to see the science behind some of the marketing.
• Extract iron from common breakfast cereal. Determine the form of iron present and compare the quantity present to the quantity specified on the Nutrition Facts label. It’s elemental!
• Iodide is added to iodized salt to prevent thyroid and other diseases. Demonstrate the presence of this essential nutrient by oxidizing the iodide and doing a starch–iodine test.
• Do some simple measurements to illustrate how it’s possible to claim that salt substitutes have less sodium than regular table salt.
• Reveal the nature of the “secret ingredient” added to freshly cut fruit to prevent it from turning brown.
This great series of demonstrations will build connections between science and real life. Instructor Demonstration Notes included.
Sunscreens: Preparation and
Evaluation—Student Laboratory Kit
By: David A. Katz, Retired, Wilmington, DE
Sunburn! We have all experienced the pain and misery of overexposure to the Sun’s intense “heat.” Sunscreens applied to the skin shield us from the damaging ultraviolet rays. Students will create their own sunscreen from one of eight prescribed formulations of lotions and sunscreen chemicals. Once the sunscreens are made, students use a spectrophotom- eter to determine the absorbance of ultraviolet light by their sunscreen. The results are compared to determine the most effective sunscreen.
Complete for 30 students working in pairs. A spectrophotometer is required and available separately.
Determination of the Hardness of
Water—Student Laboratory Kit
By: The Flinn Staff
Titrate metal ions found in tap water using the reagent ethylenediami- netetraacetic acid (EDTA). The end point is found using a dye called Eriochrome Black T (EBT), which also forms complexes with metal ions in solution. Students learn how to properly use pipets and burets and will perform stoichiometric calculations involving volume and molarity. Includes reproducible student procedure, complete Instructor Notes with sample data and answers to questions, and all necessary chemicals.
Complete for 24 students working in pairs.
1-800-452-1261
flinnsci.com
186
Catalog No.
Description
Price/Each
AP7375
FD&C Food Dyes, Set of 7
$42.80
FD&C Food Dyes AP7375
Chemistry of Food Additives—Multi-Demonstration Kit AP7288
Catalog No.
Description
Price/Each
AP7288
Chemistry of Food Additives— Multi-Demonstration Kit
$66.25
Catalog No.
Description
Price/Each
AP7433
Sunscreens: Preparation and Evaluation— Student Laboratory Kit
$54.35
AP7026
Flinn Spectrophotometer
1031.10
Sunscreens: Preparation and Evaluation—Student Laboratory Kit AP7433
Determination of the Hardness of Water—Student Laboratory Kit AP9091
Catalog No.
Description
Price/Each
AP9091
Determination of the Hardness of Water— Student Laboratory Kit
$29.70
CONSUMER SCIENCE continued on next page.