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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.
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ÖìСÃ÷1985(½ð±Ò+8, ²©Ñ§EPI+1): 4 2011-04-25 16:54:01
ÒýÓûØÌû:
Originally posted by ÖìСÃ÷1985 at 2011-04-06 15:16:03:
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 molybd ...

ÕâÀïµÄ73ml 11.7FÊÇÖ¸ÔÚ»ªÊÏ11.7¶ÈϵÄ73ml°É£¬ÒòΪÀÏÃÀÓеÄʱºò»¹ÊÇÓûªÊ϶ȵġ£
4Â¥2011-04-06 16:57:46
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zhihua123321

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ÒýÓûØÌû:
Originally posted by ÖìСÃ÷1985 at 2011-04-06 15:16:03:
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 molybd ...

Ê®¶þË®ºÏÁ×ËáÇâ¶þÄÆ(18g)ÈÜÓÚ13ml¸ßÂÈËáÓë20mlË®ËùÅäÖÆ³ÉµÄÈÜÒºÖС£½«´Ë»ìºÏÈÜÒºÀäÈ´ÖÁ-10¡æ¡£È»ºó½«108g Na2MoO4•2H2OÈÜÓÚ200mlË®ËùÅäÖÆµÄÈÜÒºÔÚ-10¡æµÎ¼ÓÖÁÉÏÊö»ìºÏÒºÖС£×îÖյõ½µÄÒºÌåΪdz»ÆÉ«¡£
Nomatterhowyoufeel,getup,dressupandshowup!
3Â¥2011-04-06 16:53:44
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ÖìСÃ÷1985

½ð³æ (СÓÐÃûÆø)

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5Â¥2011-04-06 20:09:38
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ÖìСÃ÷1985

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¡°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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