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Product 15959

By: The Flinn Staff

College Level Guided-Inquiry Lab Kit: Analysis of Food Dyes in Beverages lets you develop and test skills in preparing accurate serial dilutions, understanding spectroscopic measurements, and extrapolating from graphical data.

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Product Details

College Level General Chemistry Guided-Inquiry Experiment Food dyes are everywhere—from food to drink to cosmetics! How much food dye is actually contained in these products? This guided-inquiry lab allows students to utilize spectroscopy and graphical analysis to determine the concentration of dye in a sports drink. The lab begins with an introductory activity in which students prepare a series of standard dilutions of an FD&C Blue 1 stock solution. Students then measure the percent transmittance of each and graph the results to identify an optimum linear relationship among various functions (T, %T, log T and A) for a Beer's law calibration curve. A Beer’s law plot of absorbance as a function of concentration may then be used to calculate the concentration of any “unknown” solution. Using this introductory procedure as a model, students design guided-inquiry experiments to determine the concentration of food dye(s) in sports drinks and other consumer beverages. Additional dyes (FD&C Yellow 5 and Red 40) and samples of sports drinks are included in the kit for optional extension or cooperative class inquiry studies. Use this investigation to develop—and test—skills in preparing accurate serial dilutions, understanding spectroscopic measurements, and extrapolating from graphical data. Complete for 24 students working in pairs.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Asking questions and defining problems
Developing and using models
Planning and carrying out investigations
Analyzing and interpreting data
Engaging in argument from evidence
Obtaining, evaluation, and communicating information

Disciplinary Core Ideas

HS-PS1.B: Chemical Reactions
HS-PS1.A: Structure and Properties of Matter
HS-PS4.B: Electromagnetic Radiation
HS-PS4.C: Information Technologies and Instrumentation

Crosscutting Concepts

Systems and system models

Performance Expectations

MS-PS4-2. Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
MS-PS1-1. Develop models to describe the atomic composition of simple molecules and extended structures.
MS-PS1-2. Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.
HS-PS1-1. Use the periodic table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms.
HS-PS1-2. Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.
HS-PS4-4. Evaluate the validity and reliability of claims in published materials of the effects that different frequencies of electromagnetic radiation have when absorbed by matter.
HS-PS4-5. Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.