Changing Hydrangea blossoms from red to blue
Today’s Video of the Day from the American Chemical Society shows the power of persistence as the people behind the Reactions series fail, and then succeed, at changing the color of Hydrangea blossoms from red to blue.
The first experiment likely failed due to the use of artificial light and an aluminum solution that was potent enough to poison the flowers. For the second attempt, which proved to be successful, the team exposed the flowers to natural sunlight and lower concentrations of aluminum and citrate.
Video Credit: American Chemical Society