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Sodium metasilicate (1 1 g, 50 mmol) is dissolved in 100 mL of water (Solution A). Sodium tungstate (182g, 0.55mol) is dissolved in 300mL of water in a separate1-L beaker containing a magnetic stirring bar. To this solution, 165mL of 4M HCI is added in 1-mL portions over 10min, with vigorous stirring (there is a local formation of hydrated tungstic acid that slowly disappears). Õâ¶Î»°ÖÐTo this solution,165mL of 4M HCl is added in 1-mL portions over 10min, ÈçºÎÀí½â£¿£¿£¿ÇóÖú°¡ |
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- ×¢²á: 2014-05-07
- ÐÔ±ð: GG
- רҵ: Óлú¸ß·Ö×Ó¹¦ÄܲÄÁÏ

2Â¥2014-12-16 21:36:57
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ÌØÁ¢¶ÀÐеÄ: ½ð±Ò+2, ·ÒëEPI+1, ÎÒ¾õµÃÄã˵µÄºÜÓеÀÀí 2014-12-16 22:18:34
ÌØÁ¢¶ÀÐеÄ(RXMCDM´ú·¢): ½ð±Ò+4 2014-12-18 23:53:13
ÌØÁ¢¶ÀÐеÄ: ½ð±Ò+2, ·ÒëEPI+1, ÎÒ¾õµÃÄã˵µÄºÜÓеÀÀí 2014-12-16 22:18:34
ÌØÁ¢¶ÀÐеÄ(RXMCDM´ú·¢): ½ð±Ò+4 2014-12-18 23:53:13
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3Â¥2014-12-16 22:02:58














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