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Item #: AP7663

Price: $59.50

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In the Properties of Buffer Solutions Inquiry Lab Solution for AP® Chemistry, students attempt to design an ideal buffer solution effective in a specific pH range and to verify its buffer capacity.

Includes access to exclusive FlinnPREP™ digital content to combine the benefits of classroom, laboratory and digital learning. Each blended learning lab solution includes prelab videos about concepts, techniques and procedures, summary videos that relate the experiment to the AP® exam, built-in student lab safety training with assessments, and standards-based, tested inquiry labs with real sample data. FlinnPREP™ Inquiry Lab Solutions are adaptable to you and how you teach with multiple ways to access and run your AP® labs.

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Item# EL6031 AP7663
Type Digital Content Only Lab Kit & Digital Content
Price $14.95 $59.50
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Product Details

Big Idea 6, Investigation 16, Primary Learning Objective 6.18

What are buffers made of? How does a buffer work? Can a buffer be designed to be effective in a given pH range? Is there such a thing as an ideal buffer? The purpose of this advanced-inquiry lab kit is to design a buffer solution that will be effective in a specific pH range and to verify its buffer capacity.

Students begin the investigation with an introductory activity to explore the composition and pH of ideal buffers and compare their pH changes when a strong acid and base are added. Understanding the properties of buffers prepares students for the guided-inquiry challenge—to design a buffer that will provide effective protection at a specific pH and that will have the capacity to maintain the pH within a narrow range when prescribed amounts of acid and base are added.  

Complete for 24 students working in pairs.

Specifications

Materials Included in Kit:
Acetic acid solution, 0.1 M, 500 mL, 2
Ammonium chloride, 10 g
Ammonium hydroxide solution, 0.1 M, 500 mL
Buffer envelope, pH 7
Citric acid solution, 0.1 M, 500 mL
Hydrochloric acid solution, 0.5 M, 500 mL
Seltzer water, 8 oz, bottle
Sodium acetate, 30 g
Sodium bicarbonate, 10 g
Sodium dihydrogen citrate, 12 g
Sodium hydroxide solution, 0.5 M, 500 mL
Sodium phosphate solution, 0.1 M, 500 mL
Sodium phospate, dibasic, 20 g

Additional Materials Required (for each lab group): Distilled water, 0.01-g precision balance (shared), beakers, buret or disposable pipets, graduated cylinders, pH meter or paper (indicators, optional), spatula, stirring rod, medium test tubes, test tube rack, wash bottle, weighing dishes.

Additional Materials Required (for Pre-Lab Preparation): Bottles to store solutions, Erlenmeyer flasks, graduated cylinders, magnetic stirrer and stir bar.

*Advanced Placement and AP are registered trademarks of the College Board, which was not involved in the production of, and does not endorse, these products.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Planning and carrying out investigations
Analyzing and interpreting data
Using mathematics and computational thinking
Constructing explanations and designing solutions

Disciplinary Core Ideas

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

Crosscutting Concepts

Patterns
Cause and effect
Scale, proportion, and quantity

Performance Expectations

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-PS1-6. Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.
HS-PS2-6. Communicate scientific and technical information about why the molecular-level structure is important in the functioning of designed materials.