104年 - 104 淡江大學轉學考普通化學#53301

科目：轉學考-普通化學 | 年份：104年 | 選擇題數：5 | 申論題數：10

試卷資訊

所屬科目：轉學考-普通化學

選擇題 (5)

1. Which of the following has the greatest bond strength? (A) B₂ (B) O₂^- (C)CN^- (D)O₂⁺ (E)NO^-

2. Which of the following is the correct order of boiling points for C₂H₆, CH₃OH, KNO₃, and Ne? (A) Ne ＜ C₂H6 ＜ KNO₃ ＜ CH₃OH (B) C₂H₆ ＜ Ne ＜ CH₃OH ＜ KNO₃ (C) KNO₃ ＜ CH₃OH ＜ C₂H₆ ＜ Ne (D) Ne ＜ C₂H₆ ＜ CH₃OH ＜ KNO₃ (E) Ne ＜ CH₃OH ＜ C₂H₆ ＜ KNO₃

3. If you mixed 10.0 mol A, 10.0 mol B, and 5.0 mol C in a one-liter container at T₁, which direction would the reaction initially proceed? (A) To the right. (B) To the left. (C) The above mixture is the equilibrium mixture. (D) Cannot tell from the information given. (E) None of these (A-D).

4. At T₂ (＞ T₁), [= 1.0. Placing the equilibrium mixture in an ice bath will (A) cause [A] to increase (B) cause [B] to increase (C) have no effect (D) cannot be determined (E) none of the above

5. If a compound has several individual dipoles, then:

I: It is ionic.

II: It is polar overall.

III: It is a planar molecule.

IV: It doesn't have resonance.

V: There is an electronegativity difference between the bonded atoms.

(A) I only (B) II only (C) V only (D) II, V (E) All of the above statements are correct.

申論題 (10)

第二部份：填充題（每個空格4分，共20分）

1. Which of the following elements show a partially filled d orbital in the electron configuration with the lowest energy? Ti, Cr, Ni, Cu, Zn, Ga ____

2. How many electrons can be contained in all of the orbitals with n = 4? ____

3. Write down the formula for the fluoride of an element whose electron configuration is [Kr] 5s²4d¹⁰5p².____

4. Which of the following molecules have a trigonal bipyramidal electron pair arrangement? Br₂, BF₃, CHBr₃, CO, SF₄, XeCl₂ ____

5. The quantitative relation between the Ka of a weak acid, the Kb of its conjugate base, and the water autoionization constant K_w. ____

第三部份：計算問答題（共60分）

1 . Describe and explain how to use a titration method to determine the analytical concentration C_HA and the pK_a value of a weak acid HA. Define all the quantities used in your answer. (20%)

(a) Draw the setup and indicate the cathode and anode, the positive and negative electrodes, and all the components in the cell.

(b) Explain where and how the liquid junction potential occurs in the cell.

3• For the reaction: CaCO₃(s)⇌ CaO(s) + CO₂(g) K_p = 1.00 at 727 °C.

If a 48.8-gram sample of CaCO₃ (100.0 g/mol) is put into a 10.0-L container and heated to 727 °C, what percent of the CaCO₃ will react to reach equilibrium? (15%)

4. According to the provided information in the right table, calculate AH for:

2Li(s) + 2HI(g)→ H2(g) + 2LiI(s)(10%)