49.6 MB (4.2 MB compressed)
5115 x 3392 pixels
43.4 x 28.7 cm ⏐ 17.1 x 11.3 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Universal indicator changes its colour depending on the pH of a solution. Here, a universal indicator was added to a beaker containing an alkaline solution (baking soda).
Model release not required. Property release not required.