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How can saline hydrides remove traces of water from organic compounds? 

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Saline hydrides are ionic in nature. They react with water to form a metal hydroxide along with the liberation of hydrogen gas. The reaction of saline hydrides with water can be 

represented as: 

(where, A = Na, Ca,……) When added to an organic solvent, they react with water present in it. Hydrogen escapes into the atmosphere leaving behind the metallic hydroxide. The dry organic solvent distills over. 

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