50.8 MB (2.8 MB compressed)
3434 x 5166 pixels
29.0 x 43.7 cm ⏐ 11.4 x 17.2 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Adding potassium hydroxide to water, 2 of 4. Potassium hydroxide (KOH), 0.1 M concentration, is poured into a beaker that contains water with few drops of phenolphthalein indicator added. Water turns progressively pink as the solutions become alkaline throughout the volume.
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