Three indicators are used in conjunction with acids and bases to create a rainbow of colors. In a basic solution, phenolphthalein is red, p-nitrophenol is yellow, and thymolphthalein is blue. These can be combined in various ways to create all the colors of the rainbow. If done correctly the students only see the acid or base being poured, which adds to the impressive display. There are enough materials to complete the demonstration 7 times.

Kit Includes:
25mL Red Indicator
25mL Orange Indicator
25mL Yellow Indicator
25mL Green Indicator
25mL Blue Indicator
25mL Violet Indicator
2 X 30mL Hydrochloric Acid 1.0N
2 X 30mL Sodium Hydroxide 1.0N
30mL Sodium Hydroxide Sol 6.0M (6N)