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Sodium monohydrogen phosphate Na2HP04-12H20 (18 g) is dissolved in a mixture of perchloric acid (73 mL, 11.7 F) and water (20 mL). The solution is cooled to -10 OC. Then a solution of sodium molybdate Na2Mo04.2H20 (108 g) in water (200 mL) is added dropwise to the above solution kept at -10 OC. The resulting solutionis pale yellow. ÀïÃæµÄ¡°73 mL, 11.7F" ÊÇʲôÒâ˼£¬FÊÇָʲô£¿Ð»Ð» £¡ |
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yixinling
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4Â¥2011-04-06 16:57:46
zhihua123321
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3Â¥2011-04-06 16:53:44
ÖìСÃ÷1985
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5Â¥2011-04-06 20:09:38
ÖìСÃ÷1985
½ð³æ (СÓÐÃûÆø)
- Ó¦Öú: 0 (Ó×¶ùÔ°)
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- Ìû×Ó: 179
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ÒòΪÄã¿´ºóÃæ»¹Óà ÉãÊ϶ȣ¬ ¶øÇÒ¼´Ê¹°ÑF»»³ÉÉãÊ϶ȣ¬¸Ð¾õ¾Í²»¶Ô£¡ ÔÙ¿´Õâ¾ä ¡°Na2W04.2H20 (120 g) is dissolved in water (150 mL). Orthophosphoric acid, H3P04 (3 mL,14.7 F), and concentrated acetic acid (22 mL, 17.4 F) are successively added to the solution. The white salt Na8HPW9034.24H20p recipitates out.¡± Ò»ÑùµÄÕâ¸ö"F"Ó¦¸ÃÔõô½âÊÍ£¿ |
6Â¥2011-04-06 20:17:29














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