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Buffer Balancing Acts—Chemical Demonstration Kit

By: The Flinn Staff

Item #: AP6288

Price: $40.40

The Buffer Balancing Acts Chemical Demonstration Kit will help to teach about buffers in a way students will comprehend. Students will learn what components are present in a buffer and how each component plays a unique role in the process.

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This item can only be shipped to schools, museums and science centers

Product Details

Buffers provide an essential acid–base balancing act in living cells, lakes and in many consumer products. What are buffers made of and how do they work? First, prepare an ideal pH 7 phosphate buffer—the same buffer that protects enzymes and proteins in cells. Next, use indicators to show how the buffer resists pH changes and protects against acids and bases. Students will learn not only what components are always present in a buffer, but also understand how each component plays a unique role in making the buffer work. Finally, apply what students have learned about buffers by testing the buffer capacity of Alka-Seltzer® tablets. Buffers are one of the most difficult concepts in acid–base chemistry.

Concepts: pH, buffers, weak acid, conjugate base.
Time Required: 15 minutes
Chemicals Provided: Hydrochloric acid, sodium hydroxide solution, sodium phosphate (monobasic) and sodium phosphate (dibasic) solutions, bromthymol blue, universal indicators and Alka-Seltzer tablets.