Identify the color change region(s) for each of these nine indicators. Make sure to record both the pH of the change (it should be 2 - 4 pH units) and the color before, during and after each of the changes. Remember that some indicators may have more than one color change region. Each of the links below takes you to a page that has 13 test tubes containing buffers with pH's from 1 to 13. To each has been added 2 - 4 drops of referenced indicator.

introduction

background

prelab

experiment

postlab