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Environment

Quiz: How much do you know about the chemistry behind hydrangea colors?

Test your knowledge of how chemical components like soil pH and metal ions affect hydrangeas’ colorful hues

by Andy Brunning, special to C&EN
May 3, 2024
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Most Popular in Environment

 

 

Before you take our quiz on Hydrangeas, make sure you check out our Periodic Graphic for some helpful hints.

Which of the following are the main pigments contributing to color in hydrangeas?
In color-changing hydrangea species, what color are the sepals if the soil pH is 5?
Which metal ions in soil form a complex that gives hydrangeas their blue color?
At which of the following pH values would aluminum ions be available in the soil?
Which of the following class of compounds acts as a copigment in the blue aluminum complex in hydrangeas?
Which of the following substances, when added to soil, reduces soil pH to yield blue hydrangeas?
How long does it take for soil pH changes to affect hydrangea color?

You Scored 33% - 1 out of 3

Chemical & Engineering News
ISSN 0009-2347
Copyright © 2024 American Chemical Society

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