pH Measurement and Indicators
In this very popular Applied Science Concept Kit, students perform a series of very colorful tests that help them to develop a better understanding of pH, and its relationship to acids and bases, and its effect on indicator dyes. Using a LAB-AIDS® Chemplates® and universal indicator, each student creates his own pH color guide. This color guide is then used to identify the pH of the three unknowns, which are provided in this kit. Activities establish several criteria:
- Indicators can be acid or base
- Indicators have different and specific pH ranges
- A mixture of indicators can be used to create a specific guide
A student created color guide can be used to identify the pH of "Unknown Solutions" This kit is complete for 50 students.
Details at a Glance
- | ~50 minute class periods
- 1 Activity
- Accommodates 3 classes, each with 15 groups of 2 students
- Consumables service 90 students
- Requires a water source
Scientific Concepts
• Explore the wide range of acid and bases and their effect on indicator dyes
• Establish that indicator dyes have ranges that are different
• Determine that a mixture of indicators can be used as a specific color guide for pH determination
• Create individual color guides
• Color guide is used to identify pH of “unknowns” (provided in kit)
Guides & Student Sheets
Our kits and modules provide you with everything you need so you can open, review, and teach the material confidently the next day.
- Full downloadable Teacher Guide with background information, detailed instruction, example data and answers
- Downloadable Student Sheets with age appropriate background information, full procedure(s), and analysis questions
- All materials necessary to carry out the investigation
- Safety Data Sheets
Kit Components
- 15 Chemplates® , LAB-AIDS®
- 2 Bromthymol Blue, Drop control bottle
- 2 Methyl Orange, Drop control bottle
- 2 pH 1, Drop control bottle
- 2 pH 3 , Drop control bottle
- 2 pH 5 , Drop control bottle
- 2 pH 7 , Drop control bottle
- 2 pH 9 , Drop control bottle
- 2 pH 11, Drop control bottle
- 2 pH 13 , Drop control bottle
- 2 Phenolphthalein , Drop control bottle
- 2 Universal Indicator, Drop control bottle
- 1 Unknown #1, Drop control bottle
- 1 Unknown #2, Drop control bottle
- 1 Unknown #3, Drop control bottle
- 30 Student Worksheets and Guides
- 1 Teacher’s Guide with MSDS