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Introduction to pH Measurement

kit #80

This series of simple, highly visual lab activities introduce students to the effects of acids and bases on litmus indicators, indicator solutions, and natural indicators.

The activities begin by discussing the differences between acids and bases. It then moves to a discussion on the use of pH test paper and the interpretation of their results. Students are also introduced to the concept that acid and base discussions are not limited to chemistry but also extend to applications in biology and the study of the human body.

The lab activity uses LAB-AIDS© Chemplates® to study side by side, the reaction of Hydrochloric Acid and Sodium Hydroxide when mixed with other liquids and on pH paper.

Lab is complete for 50 students.


  • Observe the effects of acids and bases on indicators
  • Measure the important function of respiration

Content List in Introduction to pH Measurement is as follows:

Quantity Description
1 Teacher’s Guide with MSDS
50 Student Worksheets and Guides
12 Chemplates® w/spatula
1 Hydrochloric acid, Drop control bottle
1 Bromthymol blue , Drop control bottle
1 Phenol red, Drop control bottle
1 Sodium hydroxide, Drop control bottle
1 Phenolphthalein, Drop control bottle
1 Blue litmus paper, Vial
1 Red litmus paper, Vial
1 Universal indicator paper, Vial
Number of students
Number of groups
Maximum 12 groups per period

To complete this kit requires one ~50-minute class period.

Title Item # Price Quantity
Introduction to pH Measurement 80 $74.75
Introduction to pH Measurement REFRESH-A-KIT 80-RC $29.65