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Carolina Investigations® for Use with AP® Chemistry: Preparation of a Buffered Solution Kit

(in stock)


Prepare buffer solutions of assigned pH values and determine the buffer capacity of these solutions. Teach this laboratory experience using either the guided activity or inquiry activity. In the guided activity, students calculate the amounts of acid and base they need to prepare their stock acid and base solutions. Then using the Henderson-Hasselbalch equation they determine the volumes of stock acid and base solutions needed to prepare their buffers. Students then test the buffering capacity of these buffer solutions. In the inquiry activity, students choose the best conjugate acid-base pair to attain a buffer solution of desired pH and determine the concentration of the conjugate acid-base solutions needed to attain the required buffer capacity of the final solution.

Both activities include assessment questions that follow the format of the AP® Chemistry Exam free-response questions. In the assessment, students choose the best conjugate acid-base pair for the assigned pH, calculate the pH of the concentrated acid solution, and then calculate the required mass of conjugate base to mix with the acid to achieve the assigned pH value. These questions require setting up equilibrium equations and using the Henderson-Hasselbalch equation.

Provides the following AP® Chemistry experiences; design a procedure to collect data, analyze data, prepare solutions, and use volumetric glassware. This experiment provides a thorough experience in both buffer preparation and buffer capacity. Materials are sufficient for 30 students in teams of 3. Digital teacher's manual, included FREE with kit purchase, is a 12-month eBook license to the Preparation of a Buffered Solution teacher's manual. You can also access the digital student guide for this kit for free at Carolina Science Online®.

AP® is a trademark registered and/or owned by the College Board®, which was not involved in the production of, and does not endorse, these products.


Shipping Information or Purchase Restrictions
  • Exclamation icon Limited Qty: Corrosive - This product is/contains a limited quantity of a DOT regulated hazardous material. This item will not incur a hazmat fee when shipped by ground. Orders shipping to HI and AK are subject to review and may incur additional shipping charges.
What’s Included:
  • 2 Sodium Hydroxide, 0.1 M, 120 mL
  • 2 Hydrochloric Acid, 0.1 M, 120 mL
  • 1 Acetic Acid, 0.1 M, 1 L
  • 1 Sodium Acetate, 30 g
  • 30 Graduated Transfer Pipets, 1 mL
  • 1 Carolina Science Online® Resources (1-year subscription)
  • 1 Teacher's Manual with Reproducible Student Guide
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Needed But Not Included:
  • 10 Beakers, 400 mL
  • 20 Beakers, 100 or 150 mL
  • 40 Beakers, 50 mL
  • 10 Graduated Cylinders, 25 mL
  • 10 Graduated Cylinders, 50 mL
  • 10 Laboratory Marking Pens
  • 10 pH Probes
  •  pH Monitoring Software
  •  Chemical Scoop
  •  Distilled Water
  •  Balance (accurate to 0.01 g)
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