Site Navigation
Site Directions
Search AlgebraLAB
Career Profiles
Reading Comprehension Passages
Practice Exercises
Science Graphs
StudyAids: Recipes
Word Problems
Project History
Project Team

P Soup
Objective: This activity will involve measuring the pH of a set of buffered solutions. Once the pH is determined, the concentration of the hydronium ion can be calculated.

Time required: 1 day.

  • Measure the pH of five different solutions.
  • Manipulate the data to determine the amount of hydronium ion in each solution, [H3O+1].

Group Size: 2 students

Materials Needed Per Group:
  • A set of five different buffer solutions
  • 5 plastic cups for buffers
  • pH probe
  • wash bottle
  • one cup to serve as a waste receptacle

Prior Knowledge: The student should be able to exponentiate a number using the formula
          [H3O+1] = 10-pH


  1. Obtain 5 cups, labeled A, B, C, D, E. Each cup contains approximately 10 mL of buffer. Each of the five buffers has a different pH.

  2. Using the pH probe, students will determine the pH of each solution. The pH of each solution will be recorded in the data table. The probe must be rinsed over the waste receptacle between measurements, using a wash bottle.

    Raw Data Table

  3. The set of buffers will be returned to the lab table to be used again by the next lab group.
Analysis: Using the pH, calculate the [H3O+1] in each of the buffers.

Processed Data Table

pH of Solution     
Decimal Form
Scientific Notation

What is the relationship between the amount of [H3O+1 ] in a solution and the acidity of the solution?

E Saylor

Show Related AlgebraLab Documents

Return to STEM Sites AlgebraLAB
Project Manager
   Catharine H. Colwell
Application Programmers
   Jeremy R. Blawn
   Mark Acton
Copyright © 2003-2024
All rights reserved.