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sltmac(½ð±Ò+1): лл½»Á÷~ 2011-07-23 07:35:01
422680786(½ð±Ò+2, ·ÒëEPI+1): 2011-07-23 14:22:21
422680786(½ð±Ò+3): 2011-07-24 12:17:38
sltmac(½ð±Ò+1): лл½»Á÷~ 2011-07-23 07:35:01
422680786(½ð±Ò+2, ·ÒëEPI+1): 2011-07-23 14:22:21
422680786(½ð±Ò+3): 2011-07-24 12:17:38
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³ÆÈ¡10 gþ¿ó·Û£¬¼ÓÈë80mL Ë®£¬ÔÙ¼ÓÈë98%ÁòËá20mL£¬½Á°è£¬·´Ó¦Î¶ÈΪ70¡æ£¬Ê±¼ä2 h£¬¹ýÂË£¬µÃÒ»´ÎÂËÒº¡£ Weigh 10g of magnesium powder and add 80mL of water followed by 20mL 98% sulfuric acid. Then stir the mixture under a reaction temperature of 70 ¡æ for 2 hours. Finally filtrate to get the filtrate. |
2Â¥2011-07-18 17:04:58














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