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pH Properties of Buffer Solutions—Classic Lab Kit for AP® Chemistry

By: The Flinn Staff

Item #: AP6445 

Price: $55.13

In Stock.

With the pH Properties of Buffer Solutions Classic Lab Kit for AP® Chemistry, students investigate the properties of buffer solutions. This lab is challenging and tests students’ understanding of pH and buffer chemistry.

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Classic AP Requirement #19—Preparation and Properties of Buffer Solutions

In this laboratory, students investigate the properties of buffer solutions. The students make two ideal buffer solutions, one consisting of a weak acid and its conjugate base and the other, a weak base and its conjugate acid. The initial pH of each solution is determined. Strong acid and strong base are then added to each buffer in a series of steps, with the pH determined after each addition. The resulting pH values after each addition are compared to calculated values for each buffer. A challenging lab to test students’ understanding of pH and buffer chemistry.

Complete for 24 students working in pairs.

pH Properties of Buffer Solutions Inquiry Guidance & AP® Chemistry Curriculum Alignment Transition Guide available! Follow the link in Resources to find this valuable publication that lets you adapt this classic AP Chemistry experiment for guided-inquiry and correlate with the AP Chemistry curriculum framework.


Materials Included in Kit: 
Acetic acid solution, 0.1 M, 500 mL, 2
Ammonia/Ammonium chloride buffer, pH 9.26, 500 mL, 3
Hydrochloric acid solution, 0.2 M, 400 mL
Sodium acetate solution, 0.1 M, 500 mL, 2
Sodium hydroxide solution, 0.2 M, 200 mL, 2
Pipet, Beral-type, graduated, 50

Additional Materials Required (for each lab group): pH 7 buffer solution, distilled water, beakers, graduated cylinders, magnetic stirrer and stir bar (optional), marking pen, pH meter (or pH sensor), stirring rod, wash bottle.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Planning and carrying out investigations
Analyzing and interpreting data
Asking questions and defining problems
Using mathematics and computational thinking

Disciplinary Core Ideas

HS-PS1.A: Structure and Properties of Matter
HS-PS1.B: Chemical Reactions

Crosscutting Concepts

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

Performance Expectations

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.
HS-PS1-5: Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs.
HS-PS1-7: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.