49.8 MB (3.7 MB compressed)
3396 x 5124 pixels
28.7 x 43.4 cm ⏐ 11.3 x 17.1 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Red cabbage juice indicator. Red cabbage juice changes its colour depending on the pH of the solution. Here red cabbage juice was added to a plastic cup containing an alkaline solution (baking soda).
Model release not required. Property release not required.