1. What method is used to obtain salt from sea water?
Answer (1)
Answer:The primary and oldest method used to obtain salt from seawater is solar evaporation.Here's how it generally works:Collection: Seawater is collected and channeled into a series of large, shallow ponds, often called "salt pans" or "salterns."Evaporation: The sun's heat and the wind naturally cause the water in these ponds to evaporate. As the water turns into vapor and leaves, the salt becomes more and more concentrated in the remaining brine.Crystallization: As the water continues to evaporate and the salt concentration reaches a saturation point, salt crystals begin to form and settle at the bottom of the ponds. Different salts crystallize at different concentrations, allowing for the isolation of sodium chloride (common table salt).Harvesting: Once a sufficient layer of salt crystals has formed, the remaining water (called "bittern") is drained, and the salt is harvested using mechanical harvesters or sometimes manually with rakes.Processing: The harvested salt is then typically washed, dried, and sometimes further processed (e.g., sieved, refined) depending on its intended use.This method is most effective in warm, sunny climates with low rainfall and steady winds, which facilitate the evaporation process.
