Practice Final Exam

Practice Final Exam - 1. Which of the following species is...

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1 1. Which of the following species is incorrectly classified as to type of compound? Compound Classification A) Fe(OH) 3 strong soluble base B) H 2 CO 3 weak acid C) HI strong acid D) AgF soluble salt E) CH 3 NH 2 weak base 2. When each of the following compounds is dissolved in water, which one would not produce a species capable of undergoing hydrolysis with water. A) KOCl B) AgF C) NaBr D) CH 3 NH 3 Cl E) LiHCO 3 3. Which of the foll0wing will have the highest vapor pressure? A) pure H 2 O B) 0.050 m C 6 H 12 O 6(aq) C) 0.050 m C 12 H 22 O 11(aq) D) 0.24 m FeI 3(aq) E) 0.50 m KF (aq) 4. Which species produces the weakest conjugate base? A) HF K a = 6.8 × 10 -4 B) HClO K a = 3.0 × 10 -8 C) HNO 2 K a = 4.5 × 10 -4 D) HCN K a = 4.9 × 10 -10 E) CH 3 COOH K a = 1.8 × 10 -5 Question 5-6 is a double value question. Whichever response you choose, mark that letter for Questions 5 and 6. 5-6. 25.00 mL of 0.150 M HF is titrated with 0.12 M NaOH. What is the pH when 31.25 mL of base have been added? K a for HF is 6.8 × 10 -4 . A) 7.00 B) 2.76 C) 8.00 D) 6.16 E) 6.00 7. Which of the following would produce the titration curve depicted below? A) KOH titrated into HNO 3 B) HCl titrated into NH 3aq C) HNO 3 titrated into KOH D) NaOH titrated into HF E) CH 3 COOH titrated into NH 3aq
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2 8. Calculate the pK b for NH 3 if it is 1.34% ionized in a 0.100 M solution. A) 4.37 B) 4.74 C) 1.66 D) 2.33 E) 3.09 9. A(n) _________ solution contains a conjugate acid-base pair with both the acid and the base in reasonable concentrations. A) saturated B) buffer C) titrated D) neutral E) equivalent 10. What is the pH of a solution that is 0.20 M in HCN and 0.15 M in KCN. K a = 4.0 × 10 -10 for HCN. A) 7.60 B) 8.68 C) 8.80 D) 9.27 E) 10.10 11. Consider the following reaction. A + B C The reaction will be spontaneous at low temperatures (below some threshold temperature) if H is ____ and S is ____. A) +, + B) -, - C) +, - D) 0, 0 E) -, + 12. For the reaction given below, having G ° = -512 kJ at 25 ° C, the equilibrium mixture ___________. R = 8.314 J/mol·K A ( l ) + 2 D (g) 3 X (g) + Z (s) A) will consist almost exclusively of A and D B) will consist almost exclusively of A and Z C) will consist almost exclusively of X and Z D) will consist of equal amounts of A, D, X, and Z E) insufficient information given to determine 13. A solution containing which one of the following pairs of substances will not produce a buffer solution? A) NH 3 and NH 4 Cl B) CH 3 NH 2 and CH 3 NH 3 + Cl - C) HF and KF D) HNO 3 and NaNO 3 E) H 3 PO 4 and KH 2 PO 4 14. The most likely van’t Hoff factor for an 0.10 m FeBr 3 solution is ____________. A)
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Practice Final Exam - 1. Which of the following species is...

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