48.9 MB (3.2 MB compressed)
3354 x 5094 pixels
28.4 x 43.2 cm ⏐ 11.2 x 17.0 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Red cabbage juice indicator. Red cabbage juice was added to two test tubes containing solutions with different pH values. Left: acidic (0.1M hydrochloric acid), pH=1. Right: alkaline (0.1M sodium hydroxide), pH=13. Red cabbage juice changes its colour depending on the pH of the solution.
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