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112年 - 112 台北市立陽明高級中學教師甄試化學科試題#119137
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題組內容
24. The diagram shows an incomplete voltaic cell with a light bulb in the circuit.
24a. Identify the missing component of the cell and its function. [2 marks]
其他申論題
23b. The excess sulfuric acid required 20.80 cm3 of 0.1133 mol dm−3 NaOH for neutralization. Calculate the amount of excess acid present. [1 mark]
#506967
23c. Calculate the amount of H2SO4 that reacted with Mg(OH)2. [1 mark]
#506968
23d. Determine the mass of Mg(OH)2 in the antacid tablet. [1 marks]
#506969
23e. Calculate the percentage by mass of magnesium hydroxide in the 1.24 g antacid tablet to three significant figures. [1 mark]
#506970
24b. Deduce the half-equations for the reaction at each electrode when current flows. [2 marks]
#506972
25a. Ethyne, like ethene, undergoes hydrogenation to form ethane. State the conditions required. [2 marks]
#506973
25b. Outline the formation of polyethene from ethene by drawing three repeating units of the polymer. [1 mark
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25c. Under certain conditions, ethyne can be converted to benzene. Determine the standard enthalpy change, ΔHΘ , for the reaction stated, using the data in the appendix. [2 marks] 3C2H2(g) → C6H6(g)
#506975
25d. Determine the standard enthalpy change, ΔHΘ , for the following similar reaction, using ΔHf values in the appendix. [2 marks] 3C2H2(g) → C6H6(l)
#506976
25e. Explain, giving two reasons, the difference in the values for 25c and 25d. If you did not obtain answers, use −475 kJ for 25c and −600 kJ for 25d. [1 marks]
#506977
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