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À̹ø ½ÇÇè¿¡¼´Â Cu-IDA complex¸¦ ¼·Î ´Ù¸¥ Cu(NO3)2•3H2O(aq, 0.02M): NH(CH2COOH)2(aq, 0.02M) ºñÀ²·Î È¥ÇÕÇÏ¿© spectrophotometry·Î Èí±¤µµ¸¦ ÃøÁ¤ÇÏ°í, complexÀÇ formula¿Í stability constant¸¦ ÃßÁ¤Çغ¸¾Ò´Ù. ¼·Î ´Ù¸¥ volume fraction(IDA: 2,5,7,10,12,13,15,18,20,23mL, total 25mL)ÀÇ mixture¸¦ ¸¸µé°í, HNO3(aq, 15%)°ú NaOH(aq, 0.5M)À¸·Î ¸ðµç sampleÀÇ pH¸¦ ¾à 2.00À¸·Î ÅëÀÏÇÏ¿© UV-VIS spectrophotometry¸¦ ½Ç½ÃÇß´Ù. Fig.10.¿¡ µû¸£¸é ÃÖ´ë Èí±¤µµ´Â ¾à mole fractionÀÌ ¾à 0.5ÀÏ ¶§ ³ªÅ¸³µ°í, µû¶ó¼ nÀº ¥ö/(1-¥ö) ~ 0.5/0.5 ¡ë 1À̾úÀ¸¸ç, extrapolationÀ» ÀÌ¿ëÇÏ¿© ¾òÀº Fig.11.°ú Fig..12.¿¡¼´Â ÃÖ´ë Èí±¤µµ¿¡¼ÀÇ mole fractionÀÌ °¢°¢ 0.458319, 0.458207·Î, nÀº °¢°¢ 0.846106, 0.845722·Î ¿ª½Ã ¾à 1ÀÌ ³ª¿Ô´Ù. À̷νá predominant Cu-IDA complex´Â ¹ÝÀÀ¹°ÀÌ 1:1ÀÇ ºñÀ²·Î °áÇÕÇÑ ÇüŶó´Â °ÍÀ» ¾Ë ¼ö ÀÖ´Ù. À̹ø ½ÇÇèÀº protonÀÌ °³ÀÔÇÑ´Ù´Â Á¡¿¡¼ ´Ü¼øÇÑ stability constant°¡ ¾Æ´Ñ, ÃÑ°ý »ý¼º»ó¼ö(overall formation constant, K¡¯)¸¦±¸ÇØÁÖ¾ú´Âµ¥, pH 2.00 Á¶°Ç¿¡¼ K ¡¯ ´Â ¾à 0.0048402, 0.005629°¡ ³ª¿ÔÀ¸¸ç(Table.4.),¡¦(»ý·«)
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Daniel C. Harris, Quantitative Chemical Analysis(8th ed.), W.H. Freeman and Company, pp. 425- 427(2010) Sawyer. D. T. Heineman, W. R. Beebe, J. M., Chemistry Experiments for Instrumental Methods, John Wiley & Sons, pp. 198-204(1984) A.E Martell, M.Calvin, ¡°Chemistry of the metal Chelate Compounds¡±, Prentice-Hall, Engle wood Crofts, N.U (2002) http://www.chemspider.com/FullSearch.aspx
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