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“Your Safer Source for Science” Guided-Inquiry Experiments for General Chemistry
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Guided-Inquiry Experiments for General Chemistry
Provide students a unique laboratory experience by choosing one or all of Flinn’s innovative guided-inquiry experiments for general chem- istry. Each experiment is designed to promote independent thinking by combining a structured introductory activity with a less prescriptive, inquiry-based activity. Experiments include topical subjects, such as green chemistry and consumer chemistry (Buffers in Household Products). Traditional subjects, such as thermodynamics and Beer’s Law, are covered in unique ways in Designing a Handwarmer and Analysis of Food Dyes in Beverages, respectively. All kits include instructor’s notes and digital access to student procedures as well as the necessary chemicals, prepared solutions and custom supplies needed to carry out the experiment. The instructor’s notes provide real sample data, tips for running successful experiments and answers to all pre-lab, lab and post-lab questions. Flinn kits are adaptable to small and large programs. Purchase one kit for smaller lab sections (<24 students) or multiple kits for larger enrollments. Flinn’s Guided-Inquiry Experiments for General Chemistry can complement an existing laboratory curriculum or can be used to quickly build an entirely new curriculum.
Guided-Inquiry Experiments for General Chemistry
Acid–Base Titrations—Laboratory Kit
By: The Flinn Staff
A common question chemists have to answer is how much of a specific acid or base is present in a product. The amount or concentration of acid or base in a sample may be determined by acid-titration.
In this guided-inquiry lab, students conduct a series of acid–base titra- tions and determine the concentrations of two unknowns. The lab begins with an introductory activity in which students qualitatively analyze an acid and base using pH paper. This activity provides a model for a guided-inquiry experiment, during which students collect quantitative titration data using a buret and pH meter. Each group uses two acids and two bases. One of the acids will have a known molarity and the other will have an unknown molarity. The same applies to the two bases. Students graph titration curves from the collected data and determine the concen- tration of each unknown. A variety of acids and bases, strong and weak, are provided for the class to perform different combinations of titrations.
Complete for 24 students working in pairs.
Acidity of Beverages—Laboratory Kit
By: The Flinn Staff
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 vari- ous consumer beverages may be determined by titration with sodium hydroxide.
This guided-inquiry lab begins 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 titration procedure to obtain titration curve data and calcu- late 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!
Complete for 24 students working in pairs.
Acid–Base Titrations—Laboratory Kit AP7986
Catalog No.
Description
Price/Each
AP7986
Acid–Base Titrations—Laboratory Kit
$47.65
Acidity of Beverages—Laboratory Kit AP7968
Catalog No.
Description
Price/Each
AP7968
Acidity of Beverages—Laboratory Kit
$54.40
GUIDED-INQUIRY EXPERIMENTS FOR GENERAL CHEMISTRY continued on next page.