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In the General, Organic and Biological Chemistry (GOB) Lab Kit: Properties of Biological Buffers, learn all about how buffers work by examining a model carbonate blood buffer and phosphate cell buffers.

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General, Organic and Biological Chemistry Many chemical reactions in living organisms take place at neutral pH values. How do cells maintain the delicate pH balance required for life and health? Buffers! A buffer protects against rapid changes in pH when acids or bases are added to it. All living cells contain a natural buffer system to maintain the constant pH needed for proper cell function. Students will learn all about how buffers work by examining a model carbonate blood buffer and phosphate cell buffers. 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

MS-PS1.B: Chemical Reactions
HS-PS1.B: Chemical Reactions

Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity
Systems and system models

Performance Expectations

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.