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108年 - 108 高雄醫學大學_學生轉系考試試題：普通化學#86806

科目：學士後西醫-化學 | 年份：108年 | 選擇題數：15 | 申論題數：8

試卷資訊

所屬科目：學士後西醫-化學

選擇題 (15)

1. Which of the following names is correct? (A) iodine trichlorite, ICl3 (B) phosphorus pentoxide, P2O5 (C) chlorous acid, HClO2 (D) lithium hydrogen, LiH (E) calcium(II) oxide, CaO
2. Calculate the pH of a 0.010 M aluminium chloride solution. The Ka value for Al(H2O)63+ is 1.4 × 10-5. (A) pH=1.35 (B) pH=2.38 (C) pH=3.43 (D) pH=4.31 (E) pH=5.36
3. Hydrogen cyanide gas (HCN), a powerful respiratory inhibitor, is highly toxic. It is a very weak acid (Ka =6.2 ×10-10) when dissolved in water. If a 50.0 mL sample of 0.100M HCN is titrated with 0.100 M NaOH, calculate the pH of the solution at the equivalence point of the titration. (A) pH=3.05 (B) pH=8.49 (C) pH=9.21 (D) pH=10.95 (E) pH=11.36
4. Which of the following molecules are nonlinear?
NO2–, C2H2, N3–, HCN, CO2, H2O2 , N2O (central atom is N) (A) C2H2, HCN (B)NO2–, H2O2 (C)CO2, N3–(D) N3–, NO2–(E) N2O, H2O2
5. Calculate the concentration of Ag+ in a solution prepared by mixing 150.0 mL 1.0×10－3 M AgNO3 with 200.0 mL 5.00 M Na2S2O3.(K1 = 7.4×108, K2 = 3.9×104) (A) 1.8 x 10-18 mol/L (B) 4.3 x 10-4 mol/L (C) 3.8 x 10-9 mol/L (D) 8.30 x 10-4 mol/L (E) 2.86 x 10-3 mol/L
6. An aqueous solution of 10.00 g of catalase, an enzyme found in the liver, has a volume of 1.00 L at 27℃. The solution’s osmotic pressure at 27℃ is found to be 0.745 torr. Calculate the molar mass of catalase. (A) 3.86 x 108 g/mol (B) 4.15 x 104g/mol (C) 9.8 x 106 g/mol (D) 3.30 x 102g/mol (E) 2.51 x 105 g/mol
7. You have 75.0 mL of 0.10 M HA. After adding 30.0 mL of 0.10 M NaOH, the pH is 5.50. What is the Ka value of HA ? (A) 2.1 x 10-6 (B) 3.8 x 10-6 (C) 4.7 x 10-2 (D) 7.4 x 10-8 (E) 6.3 x 10-4
8. Which of the following is the correct order for molecules from most to least polar? (A) CH4 > CF2Cl2 > CF2H2 > CCl4 > CCl2H2 (B) CH4 > CF2H2 > CF2Cl2 > CCl4 > CCl2H2 (C) CF2Cl2 > CF2H2 > CCl2H2 > CH4 = CCl4   (D) CF2H2 > CCl2H2 > CF2Cl2 > CH4 = CCl4 (E) CF2Cl2 > CF2H2 > CCl4 > CCl2H2 > CH4
9. Which of the following molecules exhibits chirality?
I. 1-chloroethanol II. 2-chloroethanol III. 2-chloropropane IV. 2-chlorobutane V. 3-chloropentane (A) I, III (B) II, IV (C) II, III (D) I, IV (E) II, V

10. At a particular temperature, 12.0 moles of SO3 is placed into a 3.0 L rigid container, and the SO3 dissociates by the reaction
2SO3(g)⇌ 2SO2(g) + O2(g)
At equilibrium, 3.0 moles of SO2 is present. Calculate K for this reaction. (A) 0.033 (B) 0.056 (C) 0.44 (D) 0.22 (E) 0.55

11. Assuming that the combustion of hydrogen gas provides three times as much energy per gram as gasoline, calculate the volume of liquid H2 (density = 0.0710 g/mL) required to furnish the energy contained in 80.0 L (about 20 gal) of gasoline (density = 0.740 g/mL). Calculate also the volume that this hydrogen would occupy as a gas at 1.00 atm and 25°C. At 1.00 atm and 25°C, the hydrogen gas needed to replace 20 gal of gasoline occupies a volume of                   L. (A) 277 (B) 19700 (C) 59200 (D) 239000 (E) 977000
12. Consider the following orderings.
 I. Al＜Si＜P＜Cl        II. Be＜Mg＜Ca＜Sr
III. I＜Br＜Cl＜F         IV. Na+ ＜Mg2+＜Al3+＜Si4+
Which of these give (s) a correct trend in ionization energy? (A) III (B) I, II (C) I, IV (D) III, IV (E) I, III, IV
13. A 0.739-g sample of an iron ore is dissolved in acid. The iron is then reduced to Fe2+ and titrated with 47.22 mL of 0.02242 M KMnO4 solution. Calculate the results of this analysis in terms of % Fe (55.847 g/mol). (A) 16 (B) 22 (C) 32 (D) 40 (E) 50
14. Which of the following are paramagnetic?
 O2 O2– O22– B2 C2 N2 F2 P2 (A) O2, O22– , B2 (B) O2–, C2, N2 (C) B2, F2, P2 (D) O22–, N2, F2 (E) O2, O2–, B2

15. Name the following:
  5ee07bb701bf0.jpg (A) 1-chloro-2-methyl-3-ethylcyclopentane (B) 1-ethyl-2-methyl-3- chlorocyclopentane (C) 1-chloro-3-ethyl -2-methylcyclopentane (D) 3-chloro-1-ethyl -2-methylcyclopentane (E) 3-chloro-2-methyl -1-ethylcyclopentane

申論題 (8)

1. What is molar concentration of K+ in a solution that contains 63.3 ppm of K3Fe(CN)6(329.3 g/mol)?(4%)
2. What concentration of sodium chloride in water is needed to produce an aqueous solution isotonic with blood (II=7.70 atm at 25℃)(4%)
3. Calculate the pH of the resulting solution when mixing 75.0 mL of 0.05 M hydrochloric acid with 0.093 g of magnesium hydroxide.( Magnesium:24.3050 g/mol)(4%)
4. At 25℃, calculate the pH of a 0.25 M hydroxylamine hydrochloride solution. The Kb value for hydroxylamine is 9.1 × 10-9. (4%)
5. Calculate the molar concentration of H2SO4 (98.0 g/mol) in a solution that has a specific gravity of 1.84 and is 96.5% H2SO4 (w/w). (4%)
6. In the Lewis structure for ICl2-, how many lone pairs of electrons are around the central iodine atom?(2%)
7. Using the molecular orbital model, write electron configuration for NO+ and predict the bond order and magnetism. (8%)

8. Extraction of a three-component mixture containing benzoic acid, m-nitroaniline and azobenzene dissolved in CH2Cl2. Combination of the extraction flow sheet can also be used to isolate each of the components of a ternary mixture containing benzoic acid, m-nitroaniline and azobenzene. Please predict A, B, C, D, E. (10%)
5ee07c3de0e62.jpg