Evaporating water from a brine solution

Evaporating water from a brine solution

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Evaporating water from a brine solution using a sand tray. Brine is a solution of sodium chloride (NaCl, salt) in water. A watch glass containing the brine solution is placed onto sand in a heat-proof dish. By applying heat to the sand rather than directly to the water, evaporation can be speeded whilst boiling is avoided. Once all the water has evaporated, a solid sodium chloride residue is left on the watch glass.

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Keywords: blue flame, brine, bunsen burner, chemical, chemistry, equipment, evaporating, evaporation, experiment, gauze, heat-proof dish, heating, indirect heating, laboratory, nacl, residue, salt, sand, sand tray, school chemistry, science education, sodium chloride, sodium chloride solution, solution, tripod, watch glass, water

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