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109年 - 109 臺灣綜合大學系統_學士班轉學生聯合招生考試試題：普通化學A#120923
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題組內容
8. Please answer the followings regarding the buffer solution. (10%)
a. If you want to prepare a buffer solution at pH = 4.0 or pH = 10.0, how would you decide which weak acid-conjugate base or weak base-conjugate acid pair to use?
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A. For the species O2, O2+, and O2-, give the electron configuration and the bond order for each. Which has the strongest bond? (6%)
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B. Consider the following Lewis structure, where E is an unknown element:What are the possible identities for element E? Predict the molecular structure for this ion. (6%)
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A. The titration of Na2CO3 with HCl has the following qualitative profile:Please identify the major species in solution as points B, D, and F (6%)
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B. The salt BX, when dissolved in water, produces an acidic solution. Which of the following could be true? Account for your answer. (There may be more than one correct answer.) (6%)a. The acid HX is a weak acid.b. The acid HX is a strong acid.c. The cation B+ is a weak acid
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b. Consider a buffered solution where [weak acid] ＞ [conjugate base]. How is the pH of the solution related to the pKa value of the weak acid?
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c. A good buffer possesses a good buffering capacity. What is the buffering capacity? How do the following buffers differ in capacity? How do they differ in pH?
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四. (20%) 請說明機場跑道方位的推算及決定方式? 並說明機場跑道的編號系統的方法? 並說明跑道的容量如何定義及應考慮那些因素?
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