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Undergraduate Education

Chemistry In Pictures

Chemistry in Pictures: pH is pretty

by Craig Bettenhausen
April 9, 2019
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Most Popular in Education

 

A 96 well place is filled with colorful test tubes.
Credit: PollitaLoquita

“Today my chemistry professor had us test out the effectiveness of different pH buffers in a 96 well tray, and the results were stunning,” college student and reddit user PollitaLoquita says. Each row contains a different indicator, listed below, and each column contains a buffer at a certain pH, ranging from acidic on the left to basic on the right. Students learned about the effective range of each indicator and practiced using the indicators’ color charts to determine pH.

A Thymol blue
B Thymolphthalein
C Congo red
D Cabbage
E Bromothymol blue
F Phenolphthalein
G Indigo carmine
H Universal indicator, a mix of a few different indicators including some of the above

Credit: PollitaLoquita

Do science. Take pictures. Win money. Enter our photo contest here.

Related C&EN Content:

Chemistry Creates Comforts of Home

Array Takes A Drink

Chemistry in Pictures: 96 wells 

Chemical & Engineering News
ISSN 0009-2347
Copyright © 2025 American Chemical Society

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