50.0 MB (2.1 MB compressed)
3397 x 5146 pixels
28.7 x 43.7 cm ⏐ 11.3 x 17.2 in (300dpi)
GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Magnesium oxide reacts with water. A small amount of magnesium oxide (MgO, magnesia) in a test tube is mixed with water. Magnesium hydroxide (Mg(OH)2, milk of magnesia) is produced in the reaction: MgO + H2O -> Mg(OH)2. Magnesium hydroxide is poorly soluble in water. It still produces enough hydroxide ions to turn phenolphthalein indicator pink, indicating an alkaline resulting solution.
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