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The measured solubility and the density of the liquid phase for the ternary sodium 3-nitrobenzenesulphonate + sodium 4-nitrobenzenesulphonate + water system at 283.15 K, 303.15 K and 323.15 K are shown in Tables 1, 2 and 3, respectively. The ternary phase diagrams are given in Figures 1, 2 and 3. In the phase diagrams as shown in Figures 1, 2 and 3, W, M, and N represent water, sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate, respectively. E1, E2 and E3 represent the solubility of sodium 3-nitrobenzenesulphonate in water at 283.15 K, 303.15 K and 323.15 K; S1, S2 and S3 represent the solubility of sodium 4-nitrobenzenesulphonate in water at 283.15 K, 303.15 K and 323.15 K. It can be seen from Figures 1 , 2 and 3 that along the solubility curve E1C1, E2C2 or E3C3, linking the component points of the liquid phase and wet solid phase and extended, the point of intersection of these tie-lines is the approximate solid-phase component for the compound sodium 3-nitrobenzenesulphonate on a wet basis. Similarly, along the solubility curve S1C1, S2C2 or S3C4, linking the component points of the liquid phase and wet solid phase and extended, the point of intersection of these tie-lines is the approximate solid-phase component for sodium 4-nitrobenzenesulphonate. However, at 323.15 K, along the solubility curve C3C4, linking the component points of the liquid phase and wet solid phase and extended, the point of intersection of these tie-lines is the approximate solid-phase component for adduct of sodium 3-nitrobenzenesulphonate with sodium 4-nitrobenzenesulphonate, in which the mole ratio of the two compositions is 1:1, named as adduct A. E1C1, E2C2 and E3C3 are saturation curves corresponding to the solid-phase sodium 3-nitrobenzenesulphonate at 283.15 K, 303.15K and 323.15 K, respectively; S1C1, S2C2 and S3C4 are saturation curves corresponding to the solid-phase sodium 4-nitrobenzenesulphonate; C3C4 is saturation curves corresponding to the solid-phase of adduct A. C1 and C2 are invariant points at 283.15 K and 303.15K, which represent the cosaturated solution of the solid phases sodium 3-nitrobenzenesulphonate and sodium 4-nitrobenzenesulphonate. C3 is invariant point at 323.15 K, which represent the cosaturated solution of the solid phases sodium 3-nitrobenzenesulphonate and adduct A; and C4, the cosaturated solution of the solid phases sodium 4-nitrobenzenesulphonate and adduct A. |
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電分析化學(xué)
金蟲(chóng) (正式寫(xiě)手)
- 翻譯EPI: 13
- 應(yīng)助: 46 (小學(xué)生)
- 金幣: 2369.7
- 紅花: 10
- 帖子: 639
- 在線: 218.7小時(shí)
- 蟲(chóng)號(hào): 1693775
- 注冊(cè): 2012-03-15
- 專業(yè): 電化學(xué)分析
【答案】應(yīng)助回帖
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-軒影鳶: 金幣+20, 翻譯EPI+1, ★★★★★最佳答案 2012-04-22 18:11:29
-軒影鳶: 金幣+20, 翻譯EPI+1, ★★★★★最佳答案 2012-04-22 18:11:29
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3-硝基苯磺酸鈉、4-硝基苯磺酸鈉及水的三元體系組成的液相于283.15K，303.15K，323.15K溫度下的精確溶解度與密度分別如表1、2、3所示。三相圖已給出：圖1、2、3。 在圖1、2、3所示相圖中，W,M及N分別代表水，3-硝基苯磺酸鈉、4-硝基苯磺酸鈉。E1 E2 E3代表3-硝基苯磺酸鈉在283.15K，303.15K，323.15K時(shí)于水中的溶解度；S1 S2 S3代表4-硝基苯磺酸鈉在283.15K，303.15K，323.15K時(shí)于水中的溶解度。從圖1 2 3可以看出沿著E1C1 E2C2或 E3C3溶解度曲線，連接液相、半固體及延伸區(qū)間的組成點(diǎn)，這些連線的交點(diǎn)即為3-硝基苯磺酸鈉處于半固相時(shí)固相的大概組成。類似地，沿著溶解度曲線S1C1 S2C2 或S3C3，連接液相、半固體及延伸區(qū)間的組成點(diǎn)，這些連線的交點(diǎn)即為4-硝基苯磺酸鈉處于半固相時(shí)固相的大概組成。而在323.15K時(shí)，沿著溶解度曲線C3C4，連接液相、半固體及延伸區(qū)間的組成點(diǎn)，這些連線的交點(diǎn)即為3-硝基苯磺酸鈉與4-硝基苯磺酸鈉的加合物處于半固相時(shí)固相的大概組成，此時(shí)兩物質(zhì)摩爾比為1:1，命名為加合物A。 E1C1 E2C2 E3C3依次是3-硝基苯磺酸鈉在283.15K，303.15K，323.15K時(shí)對(duì)應(yīng)的飽和曲線；S1C1 S2C2 S3C4依次是4-硝基苯磺酸鈉對(duì)應(yīng)的飽和曲線；C3C4是固相的加合物對(duì)應(yīng)的飽和曲線。C1 C2是283.15K，303.15K下的恒比點(diǎn)，它代表固相時(shí)3-硝基苯磺酸鈉、4-硝基苯磺酸鈉混合溶液。C3是323.15K下的恒比點(diǎn)，它代表固相時(shí)3-硝基苯磺酸鈉、加合物A混合溶液；C4是固相時(shí)4-硝基苯磺酸鈉、加合物A混合溶液。 |
2樓2012-04-22 15:45:51
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