Cliffs AP Chemistry, 3rd Edition

Range Indicator Lower Color Upper Color

9.5−10.4 Thymolphthalein Colorless Blue

9.9−11.8 Alizarin yellow R Yellow Dark orange

10.6−13.4 Methyl blue Blue Pale violet

11.1−12.8 Acid fuchsin Red Colorless

11. 4−13.0 Indigo carmine Blue Yellow


12. 7−12.8 2,4,6-Trinitrotoluene Colorless Orange
    12.0−14.0 Trinitrobenzene Colorless Orange

Part V: Appendixes

8684-X AppB.F 2/9/01 8:28 AM Page 392