※ 引述《YoAndHide (Ouch￾  ￾椁jjjjjjjjj)》之铭言： : 先谢谢愿意看我问题的同学!!~ << 恕删 >> : 二 : 3 A 0.02M solution of H2SO4 has an osmotic pressure of 1.125 atm at 25度C : Find Ka for HSO4- π = (iC)RT , 粒子浓度约 i = π/(CRT) H2SO4 因为强酸, 第一段几乎全部解离 HA- --> H+ + A2- 1 1 0 -α α α ====================== 1-α 1+α α , 总粒子数 i = 2 + α , α = 0.302 Ka = [H+][A2-]/[HA-] = C(1+α)α/(1-α) = 1.1 * 10^-2 感谢 yiso 版友指正 : 8.Represent the structure of the condensation polymer made from : 2-hydroxypropanoic acid C O OH | ║ | ----> -(-O-C-C-)- C-C-COOH n : 95. : 9. The two salts AgX have very silmilar solubilities in water. : The salt AgX is much more soluble in acid than is AgY : What can be said about the relative strengths of the acids HX and HY? : a. nothing b. HY is strongerthan HX c. HX is stronger then HY : d. The acids have equal strengths. AgX is much more soluble in acid , 可能因为比较 basic 若 X- 比 Y- basic , HY 就会比 HX 还要 acid : 18. For the process X-(g) -> X-(aq) select the ion with the most negative : value of deltaH : a. F- b. Cl- c. Br- d. I- e.At- 水合能最大, 选电荷密度最高者(?) , F- : 19. The color of a transition metal complex results from : a. bending vibrations b.stretching vibrations c.transition of an electron : between d orbitals : d. transition of an electron between an s and a p orbital : e. nuclear magnetic resonance Transition of an electrons between d orbitals, 参考错合物化学 : 二-4 : 为什麽Co(NH3)6 3+ 是逆磁 而Fe(H2O)6 3+是顺磁呢? : 还有请问rate law的order有可能是负的吗 因为我算一题是-1 .... : 另外请问有人有写C卷的想对答案吗~? 虽然都查过了 还是对一下比较安心 : 谢谢! Co(NH3)6 3+ , 金属离子为 Co3+ , 组态 [Ar]d^6 Fe(H2O)6 3+ , 金属离子为 Fe3+ , 组态 [Ar]d^5 都是过渡元素第三周期, 然而 NH3 为强配位子 > H2O 因此填入电子的时候 ↑ ↑ Co3+ ￣￣ ￣￣ Fe3+ ￣￣ ￣￣ ↑↓ ↑↓ ↑↓ ↑ ↑ ↑ ￣￣ ￣￣ ￣￣ ￣￣ ￣￣ ￣￣ 有non pair电子存在, 因此为 paramagnetic -- 仅供参考 -- --

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