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2Â¥2009-04-11 18:47:54
dobdob
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heavence007(½ð±Ò+1,VIP+0):ллӦÖú 4-11 22:08
heavence007(½ð±Ò+1,VIP+0):ллӦÖú 4-11 22:08
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Ëæ±ã²éÒ»±¾Êé¾ÍÓÐµÄ Values of pH(RVS) for the Reference Value Standard of 0.05 mol kg-1 Potassium Hydrogen Phthalate at Various Temperatures t/¡ãC pH(RVS) t/¡ãC pH(RVS) t/¡ãC pH(RVS) 0 4.000 35 4.018 65 4.097 5 3.998 37 4.022 70 4.116 10 3.997 40 4.027 75 4.137 15 3.998 45 4.038 80 4.159 20 4.001 50 4.050 85 4.183 25 4.005 55 4.064 90 4.21 30 4.011 60 4.080 95 4.24 standard 0 5 10 15 20 25 30 35 37 40 50 60 70 80 90 95 0.025 mol kg Disodium hydrogen phosphate +0.025 mol kg Potassium dihydrogen phosphate 6.984 6.951 6.923 6.900 6.881 6.865 6.853 6.844 6.841 6.838 6.833 6.836 6.845 6.859 6.876 6.886 0.01 mol kg Disodium tetraborate 9.464 9.395 9.332 9.276 9.225 9.180 9.139 9.102 9.088 9.068 9.011 8.962 8.921 8.884 8.850 8.833 |
3Â¥2009-04-11 20:13:56
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4Â¥2009-04-11 21:53:52
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heavence007(½ð±Ò+1,VIP+0):ллӦÖú 4-19 23:57
heavence007(½ð±Ò+1,VIP+0):ллӦÖú 4-19 23:57
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ÓõÄÊÇ´ü×°µÄ±ê×¼ÎïÖÊÀ´ÅäµÄ£¬ÎÒ¸ÕÅä¹ý ÁÚ±½¶þ¼×ËáÇâ¼Ø pH4.00 Á×Ëá¶þÇâ¼ØºÍÁ×ËáÇâ¶þÄÆ pH6.86 ËÄÅðËáÄÆ pH9.18 ¾ùΪ25ÉãÊ϶ÈÏ |
5Â¥2009-04-19 17:10:45
snoopyzxx
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6Â¥2009-04-20 10:25:58
snoopyzxx
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7Â¥2009-04-20 10:27:06
snoopyzxx
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chemistryer(½ð±Ò+1,VIP+0):¹ÄÀø½»Á÷ 9-17 21:51
chemistryer(½ð±Ò+1,VIP+0):¹ÄÀø½»Á÷ 9-17 21:51
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8Â¥2009-04-20 10:27:42
feifei2890
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9Â¥2009-09-17 20:48:59
xiaomi1208
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