CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY
Sodium ethanoate crystallizing. White, needle- like crystals form as sodium ethanoate (sodium acetate) crystallizes out of solution in a glass flask. Crystallization occurs when a saturated solution is allowed to cool, forcing the dissolved salt to slowly build up in its solid, undissolved form. Sodium ethanoate (CH3COONa) is a colourless, water-soluble compound made by reacting ethanoic acid (vinegar) with sodium hydroxide. It is used as a pH buffer in foodstuffs, and in making dyes, soaps and pharmaceuticals, and in photography.
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