(一)Explain the following term：
(1) ligands (2) dual nuture of light (3) Hund's rule (4)ionization
(5) VSEPR model (6) charge balance
(二) Illustrate the theory of acid-base indications
(三) How to separate the cations into fine groups ?
(四) What is the meaning of Heisenberg uncertainty principle ?
(五) A buffer solution is made by adding 75.0 g of sodium acetate to 500.0 ml
of a 0.64 M solution of acetic acid . What is the pH of the final
solution ? (assume no volume change) , Ka = 1.8﹡10 -5。
(六) For the following ions，which is the proper one ，why ?
CNS-，NCS-，CSN-
(七) Calculate the [H+] in 1.0*10-4M HCN (Ka=6.2*10-10)
(八) The observed dipole moment for HF is 1.83 D [1 debye(D) = 3.336*10-30 Cm]
and the charge of an electron is 1.60*10-19 C，the H-F bond distance is
9.17*10-11 m，what is the percent ionic character of H-F bond ?
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