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POM²ÄÁϵĺϳÉ--K6P2W18O62*14H2O
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ÀýÈçÉÏÊö³£¼ûµÄPOM²ÄÁÏ£¬ÎÄÏ×Öкϳɷ½·¨ÈçÏ£º A sample of Na2WO4 2H2O (260 g; 0.79 mol) dissolved in 300 mL Millipore water was acidified by fractional addition of HCl 4M (200 mL; 08 mol) under vigourous stirring. When the cloudy solution becomes limpid again, H3PO4 2M (130 mL; 0.26 mol) and HCl 4M (100 mL; 0.4 mol) were added simultaneously. The pale yellow and limpid solution was refluxed for at least 24 h. After this reaction time, the yellow colour of the solution had become more intense. This solution was allowed to cool to room temperature and was then treated with 150 g KCl. The precipitate which appeared was filtered off and air-dried by aspiration. Á½¸öÎÊÌ⣺1»ØÁ÷24СʱÊÇÔÚʲôζÈÏÂÄØ£¿2ÓÃKClÔõô´¦Àí£¿ ÓÐ×ö¹ýÏà¹ØºÏ³ÉµÄ´óÉñ»¹ÓÐʲô¹£¼òµ¥µÄºÏ³É·½·¨ÄØ£¿ |
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