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How can saline hydrides remove traces of water from organic compounds ? |
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Answer» Solution :Saline hydrides (i.e., `NaH,CaH_(2),`etc) REACT with water formingtheir corresponding metal hydroxides with the LIBERATION of `H_(2)` gas. Thus, traces of water present in organic solvents can be EASILY removed by distillingthem over saline hydrides when `H_(2)` escapes into theatmosphere, metal hydroxide it left in the flask while DRY organic solvent distils over. Alternatively, organic compounds containing traces of water can be dried by PLACING them in a desiccator containing saline hydrides at the bottom for a few hours or perferably overnight. |
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