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| - For example, the alkali metal salts such as sodium, potassium, lithium and the like, and the alkaline earth metal salts such as magnesium, calcium and the like, are prepared by treating the carboxylic acid with an alkali metal hydroxide or hydride, or an alkaline earth metal hydroxide or hydride, such as sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium hydride, magnesium hydride an
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