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FlinnPREP™ Inquiry Labs for AP® Chemistry: Acidity of Beverages

By: The Flinn Staff

In the Acidity of Beverages Inquiry Lab Solution for AP® Chemistry students to test everyday beverages in the lab. Students use titration techniques and obtain titration curve data to calculate the molarity of acid in beverages.

Includes access to exclusive FlinnPREP™ digital content to combine the benefits of classroom, laboratory and digital learning. Each blended learning lab solution includes prelab videos about concepts, techniques and procedures, summary videos that relate the experiment to the AP® exam, built-in student lab safety training with assessments, and standards-based, tested inquiry labs with real sample data. FlinnPREP™ Inquiry Lab Solutions are adaptable to you and how you teach with multiple ways to access and run your AP® labs.

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Big Idea 1, Investigation 4, Primary Learning Objective 1.20

How much acid is in fruit juice? Fruit juices get their sweet taste from sugars and their sour or tart taste from weak acids, such as citric acid. If the juice contains too much sugar, it will taste bland, but too much acid and the juice will taste sour. The concentration of acids in various consumer beverages may be determined by titration with sodium hydroxide.

Students begin with an introductory activity for determining the proper indicator to use in the titration of acetic acid, a characteristic weak acid. The results provide a model for guided-inquiry design of a procedure to obtain titration curve data and calculate the molar concentration of acid in a beverage. Experiments may be performed as a cooperative class study or as open-inquiry activities. Three juice samples are provided, but students may also use any other light-colored soft drink or beverage.

A wonderful real-world example of everyday chemistry that fulfills key learning objectives, such as designing experiments, interpreting data and using stoichiometric calculations, to predict reaction results!

FLINNprep is just one of the powerful learning pathways accessed via PAVO, Flinn’s award-winning gateway to standards-aligned digital science content paired with hands-on learning.

Complete for 24 students working in pairs.