16一位學生利用標準化的氫氧化鈉溶液，滴定25.00 mL食用醋，使用酣酞作為指示劑，測定食 用醋樣品的醋酸濃度。下面哪一項誤差會造成食用醋酸含量微低？(A) NaOH標準溶液放置一段時間後，空氣中吸
81. Consider the following complexes: (en=H2N–CH2–CH2–NH2 and is bidentate) . Which can exhibit cis-
82. Four solutions have violet, blue, yellow and green color, respectively. Each solution contains t
19.下圖是吸光度(absorbance)對Co(II)濃度(mg/mL)的標準校準曲線 (standard calibration curve)。取 0.50 mL 未知濃度的 Co(II)溶液，並
83. Which of the following statements is the best to describe the results of attempted separation by
86. The radioactive isotope 247Bk (Z = 97) decays by a series of α-particle and β-particle productio
88. A galvanic cell consists of two half-reactions: What is the maximum work can be obtained from th
89. Alkali metals (Group 1) are different with alkaline earth metals (Group 2). Which of the followi
90. The partial pressure of CO2(g) is 0.22 atm and that of CO(g) is 0.44 atm in a mixture of the two