题目内容
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Assume that you have a complex of a transition metal ion with a d6configuration. Can you tell weather the complex is octahedral or tetrahedral if measuring the magnetic moment establishes that it has no unpaired electrons？
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A、together with
B、apart from
C、in common
D、of difference
22. The writer says that 8t a circus we can see animals doing cIever tricks.
23. The trainer usually gives the animal a piece of candy or fruit after it has done the trick.
24. The reward in the passage means "attention paid to a good behavior".
25. Many animals may be trained to do simple jobs if they know who their trainers are.
26. Geese can be used to guard a house.
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28. Trainer usually spends 40 days or so training a pigeon to inspect sm811 steel balls.
29. An ape is a large monkey.
30. Scientists believe apes may drive buses one day.
(a)[CoF6]3-(high-spin)；(b)[Co(en)3]3+(low-spin)；(c)[Mn(CN)6]3-(low-spin)；(d)[Mn(CN)6]4-(low-spin)；(e)[MnCl6]4-(high-spin)；(f)[RhCl6]3-(low-spin)。
用EDTA配位滴定法测定Fe3+与Zn2+，若溶液中Fe3+与Zn2+的浓度均为0.01mol·L-1，问：
(1)Fe3+与Zn2+能否用控制酸度的方法进行分步滴定；
(2)若能分别准确滴定，如何控制酸度。
0.10mol·L-1的AgNO3溶液50mL，加密度为0.932g·mL-1，含NH318.24%的氨水30mL，加水稀释到100mL，求算该溶液中的Ag+浓度。在溶液中再加0.10mol·L-1的KBr溶液10mL，有没有AgBr沉淀析出？如果欲阻止AgBr沉淀析出，氨的最低浓度应为多少？
以EDTA滴定法测定石灰石中CaO[M(CaO)=56.08g·mol-1]的含量，采用0.020mol·L-1EDTA滴定。设试样中含CaO约50%，试样溶解后定容250mL，移取25mL试样溶液进行滴定，则试样称取量的范围宜为多少？
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