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Ward's® AP Chemistry Investigation 16: Buffering: How do the Components Change the Buffering Ability?


Meets AP Science Practices 1, 2, 4, 5, 6, and 7

  • Addresses Big Ideas 1 & 6
  • Materials provided for 30 students working in pairs
  • Investigation includes updated literature aligned with new AP Chemistry curriculum standards
In this lab, students will explore how components in a buffer solution affect the solution's buffering capacity. Students will prepare a number of different buffer solutions, and will determine the response of these buffers as acids and bases are added. The pH of these stressed buffers will then be compared with the calculated values from the Henderson-Hasselbalch equation. From the buffer solutions prepared, a buffer system will be proposed in order to address a specific pH buffering microbiology problem. Includes acetic acid, ammonia, sodium acetate, ammonium chloride, sodium hydroxide, hydrochloric acid, sodium dihydrogen phosphate, and sodium hydrogen phosphate. Requires pH meter, magnetic stirrer, magnetic stir rod, analytical balance, burette, and ring stand/clamps, available separately. Ward's® DataHub not required to complete activity.

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

Includes:
Acetic Acid
Ammonia
Ammonium Chloride
Hydrochloric Acid
Sodium Acetate
Sodium Chloride
Sodium Dihydrogen Citrate
Sodium Dihydrogen Phosphate
Sodium Hydroxide
Sodium Hydrogen Phosphate

Required but Not Provided: Beakers, Stirring Rods/Magnetic Stirrer, pH Meter, Analytical Balance, DI Water, Graduated Cylinders, Burettes/Clamps, Ring Stands, Volumetric Flasks, Alka Seltzer (optional), pH paper (optional), Gloves, Safety Goggles, Lab Aprons.


   
 

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Item # Description Includes No. of Lab Groups Unit Availability Price Quantity
470303-026 Ward's® AP Chemistry Investigation 16: Buffering
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