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Acids, Bases and Indicators
127
Acids, Bases and Indicators—Laboratory Kits,
continued
Selecting Indicators for Acid–Base Titrations— Classic General Chemistry Experiment
See page 22.
Introduction to the pH Scale and Measurement—Super Value Kit
By: The Flinn Staff
Swimming pools, lakes, and our bodies all require specific pH levels! Your students will gain a clear understanding of pH and indicators with this introductory kit. All of the solutions are in ready-to-use dropper bottles! Students explore dramatic color changes when they test and record observations for six indicators in acidic and basic environments. In addition to analyzing colors and indicators, students also compare strengths of acids and bases. Includes reproducible student handouts, detailed background information, and Instructor’s Notes with sample data and answers to questions. Save time and prep with this easy-to-use kit!
Super Value Kit is complete for 5 classes of 30 students working in pairs.
Natural Indicators—Acids, Bases and
the pH Scale—Guided-Inquiry Kit
By: The Flinn Staff
Roses are red, violets are blue—or are they? Red roses, as well as many other flowers and fruits, contain natural indicators that are sensitive to acids and bases. The color of a natural acid–base indicator depends on pH. In this activity, the pH scale comes to life in living color as students explore the origin of acid–base indicators in nature. Students extract natural indicators from dried flowers, fruit juices or herbal teas. They then design a procedure to construct a pH color chart for their natural indicator and use the results to analyze the pH values of unknown solutions. Kit includes four natural indicator sources, a set of buffer capsules for the preparation of pH 2–12 standards, four unknowns, and synthetic indicators for comparison. Indicator choices include red roses and hibiscus—your chemistry lab has never smelled so good! Also includes reproducible student handouts, detailed background information, complete Instructor’s Notes with sample data and answers to questions, and all necessary chemicals and consumable supplies.
Complete for 30 students working in pairs.
See free video at flinnsci.com.
Blue Maize Indicator—
Student Laboratory Kit
By: The Flinn Staff
Acid-base indicators have been around for centuries and can be made from multiple materials. In this lab, students study the indicator proper- ties of blue maize flour, also known as blue corn flour. First, students create a color guide using a blue maize flour suspension. After viewing the colors of the flour indicator at various pH values, the blue maize indicator is used to determine the pH of lab chemicals and household liquids. Have fun exploring the pH of various solutions with this vibrant indicator!
Complete for 30 students working in pairs.
Introduction to the pH Scale and Measurement— Student Laboratory Kit
AP7637
Catalog No.
Description
Price/Each
AP7637
Introduction to the pH Scale and Measurement—Super Value Kit
$66.15
Natural Indicators—Acids, Bases and the pH Scale— Guided-Inquiry Kit
AP6442
Catalog No.
Description
Price/Each
AP6442
Natural Indicators—Acids, Bases and the pH Scale—Guided-Inquiry Kit
$64.60
Catalog No.
Description
Price/Each
AP8490
Blue Maize Indicator—Student Laboratory Kit
$47.10
ACIDS, BASES AND INDICATORS—LABORATORY KITS continued on next page.
Blue Maize Indicator— Student Laboratory Kit AP8490