Practice: Acid/Base Buffer pH Calculations
- Year levels
- Years 8–12
- File type
- Microsoft Word
- Subject
- Chemistry, Science
- Topic
- Acid/base, Buffer
- Resource types
- Worksheets
From the author
About this resource
This resource includes 10 practice problems which cover the calculations of acid/base buffer pH using the Henderson-Hasselbalch formula pH = pKa + log(A-/HA).
Half of the problems are designed for the calculation of buffer pH and the other half the resulting pH when adding to a buffer solution.
The answers and solutions to each question are provided.
This resource is available with Korean and Spanish translations for ESL students.
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In the classroom
Teaching tips & learning objectives
Learning objectives
Calculate the pH of a buffer using pH = pKa + log(A-/HA)
Calculate the pH of a buffer after a strong acid or base is added
Teaching tips
Several problems require converting Ka or Kb values and taking logarithms, so students need a calculator with a log function.
Skills covered
Buffer calculations — applying the Henderson-Hasselbalch equation with given concentrations and Ka values
Stoichiometry within buffers — adjusting acid and conjugate base amounts after an addition before finding pH
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Resource details
Concepts & topics
Core concepts
Core concepts
Buffer solutions
Henderson-Hasselbalch equation
PKa
Topics
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