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Dibasic salt and calcium oxide¡ª Weigh accurately about 1.5 g, and dissolve by
warming with 25.0 mL of 1 N hydrochloric acid VS. Cool, and slowly titrate the excess of 1N hydrochloric acid, while agitating constantly, with 0.1 N sodium hydroxide VS to a pH of 4.0, determined potentiometrically. Not less than 13.0 mL and not more than 14.3 mL of 1N hydrochloric acid is consumed for each g of salt, calculated on the ignited basis.
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zjb-lufia(yuanahen´ú·¢): ½ð±Ò+2, ¸Ðл²ÎÓ룬»¶Ó­³£À´ 2013-07-04 10:54:37
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suchang198

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6Â¥: Originally posted by zjb-lufia at 2013-07-05 10:26:08
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7Â¥: Originally posted by suchang198 at 2013-07-05 15:36:41
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