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The following pictures represent solutions that contain a weak acid HA (pKa = 5.0) and its potassium salt KA. Unshaded spheres represent H atoms and shaded spheres represent A- ions. (K+, H3O+, OH-, and solvent H2O molecules have been omitted for clarity.)     100) Which solution has the highest pH? A) (1) B) (2) C).
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14.2   Algorithmic Questions 1) When dissolved in water, which compound is generally considered to be an Arrhenius acid? A) H NO2 B) KOH C) Li F D) CH3OH   2) Which Br∅nsted-Lowry acid is not considered to be a strong acid in water? A) H I B) H Br C) H2S O3 D) H NO3 3).
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11) The iron content of foods can be determined by dissolving them in acid (forming Fe3+), reducing the iron(III) to iron(II), and titrating with cerium(IV): Fe2+(aq) + Ce4+(aq) → Fe3+(aq) + Ce3+(aq). Identify the two half-reactions in the above reaction. A) oxidation half-reactionreduction half-reaction Fe2+(aq) + e-→ Fe3+(aq)Ce4+(aq) → Ce3+(aq) + e- B) oxidation.
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      110) According to the diagram above, the forward reaction is A) nonspontaneous at d and e, and spontaneous at f. B) nonspontaneous at d, at equilibrium at e, and spontaneous at f. C) spontaneous at d, at equilibrium at e, and nonspontaneous at f. D) spontaneous at d, e, and f. 111) According to the.
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121) What is the strongest acid among the following? A) HIO B) HIO2 C) HIO3 D) HIO4 122) What is the strongest acid among the following? A) CH3CO2H B) ClCH2CO2H C) Cl2CHCO2H D) Cl3CCO2H 123) Identify the Lewis acid that acts as a reactant in the following reaction. Fe(H2O)63+(aq) + 6 CN-(aq) → Fe(CN)63-(aq) + 6 H2O(l) A) Fe3+ B) H2O C) CN- D) Fe(H2O)63+ 124).
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16.3   Short Answer Questions 1) Chemical and physical changes can be classified as spontaneous or nonspontaneous. At 25°C and 1 atm pressure the decomposition of water into hydrogen and oxygen is classified as ________, and the melting of ice is classified as ________. 2) The sign (+ or –) of ΔH is.
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      142) Which of the above pictures represents a solution of a weak diprotic acid H2A for which Ka1 >> Ka2? (Water molecules have been omitted for clarity.) A) picture (a) B) picture (b) C) picture (c) D) picture (d) 143) Which of the above pictures represents a solution of a diprotic acid H2A for which.
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17.1   Multiple-Choice Questions 1) Which of the following terms can be used to describe an electrochemical cell in which a spontaneous chemical reaction generates an electric current? I.an electrolytic cell II.a galvanic cell III.a voltaic cell A) only I B) only II C) only III D) II and III 2) Which cell involves a nonspontaneous redox reaction? A) concentration cell B).
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The following plot shows two titration curves, each representing the titration of 50.00 mL of 0.100 M acid with 0.100 M NaOH.     121) Which point a-d represents the equivalence point for the titration of a strong acid? A) point a B) point b C) point c D) point d 122) Which point a-d represents the.
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15.1   Multiple-Choice Questions 1) Which is a net ionic equation for the neutralization of a strong acid with a strong base? A) HCl(aq) + NaOH(aq) ? H2O(l) + NaCl(aq) B) H3O+(aq) + OH-(aq) ? 2 H2O(l) C) HF(aq) + NaOH(aq) ? H2O(l) + NaF(aq) D) HF(aq) + OH-(aq) ? H2O(l) + F-(aq) 2) Which is a.
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11) The neutralization constant Kn for the neutralization of phenobarbital (C12H12N2O3) and morphine (C17H19NO3) is 2.9. The acid dissociation constant Ka for phenobarbital is 3.9 × 10-8. What is the base dissociation constant Kb for morphine? A) 1.3 × 10-22 B) 6.3 × 10-23 C) 7.4 × 10-7 D) 1.1 × 107 12) Which of.
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The following pictures represent solutions of three salts MA; water molecules have been omitted for clarity. Dotted spheres represent Ay- ions; gray spheres represent Mx+ ions; black spheres represent oxygen atoms; and unshaded spheres represent hydrogen atoms.         151) Which picture represents an acidic salt? A) (1) B) (2) C) (3) D) None of these 152).
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14.3   Short Answer Questions 1) The Br∅nsted-Lowry acids in the chemical equation below are ________ and ________. HNO2(aq) + H2O(l) ? H3O+(aq) + NO2–(aq) 2)  The equilibrium constant for the reaction below has the value Ka = 3.5 × 10-4. In this reaction the stronger Br∅nsted-Lowry acid is ________ and the weaker Br∅nsted-Lowry.
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11) Standard molar entropies, S°, in J/Kmol, are given below each reactant and product in the reaction shown below. The standard entropy of reaction, ΔS°, for this reaction is ________ J/K. 2 SO2(g)+ O2(g) → 2 SO3(g) 248.1205.0256.6 12) The most commonly used white pigment is titanium white, which is titanium(IV) oxide,.
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The following pictures represent solutions at various stages in the titration of a weak diprotic acid H2A with aqueous KOH. Unshaded spheres represent H atoms, black spheres represent oxygen atoms, and shaded spheres represent A2- ions. (K+, H3O+ initially present, OH- initially present and solvent water molecules have been omitted.
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81) Which of the following metal hydroxides are amphoteric? A) Al(OH)3, Zn(OH)2, Cr(OH)3, Sn(OH)2 B) Cu(OH)2, Mn(OH)2, Fe(OH)2, Fe(OH)3 C) Be(OH)2, Ca(OH)2, Ba(OH)2, Sr(OH)3 D) LiOH, NaOH, KOH, RbOH 82) Which of the following reactions are not consistent with the concept of acid base amphoterism? A) Al(OH)3(s) + OH-(aq) → Al(OH)4-(aq) B) Al(OH)3(s) + 3 H3O+(aq) →.
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21) Standard free energies of formation, ΔG°, in kJ/mol, are given below each reactant and product in the reaction shown below. The standard free energy of reaction, ΔG°, for this reaction is ________ kJ. CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) –50.80–394.4–237.2 22)  The standard free energy for a reaction is.
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In the following reaction the unshaded spheres represent H atoms.     131) Identify the Br∅nsted-Lowry acids. A) (1) and (3) B) (1) and (4) C) (2) and (3) D) (2) and (4) 132) Identify the Br∅nsted-Lowry bases. A) (1) and (3) B) (1) and (4) C) (2) and (3) D) (2) and (4) In the following reaction the unshaded spheres represent.
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15.3   Short Answer Questions 1) The balanced net ionic equation for the neutralization reaction involving equal molar amounts of HNO3 and KOH is ________. 2) The balanced net ionic equation for the neutralization reaction involving equal molar amounts of HCl and CH3CH2NH2 is ________. 3) What is the equation relating the equilibrium constant Kn.
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16.1   Multiple-Choice Questions 1) Which of the following statements is not true? A) The reverse of a spontaneous reaction is always nonspontaneous. B) A spontaneous process always moves toward equilibrium. C) A nonspontaneous process cannot be caused to occur. D) A highly spontaneous process need not occur rapidly. 2) Which forward reaction is a nonspontaneous process? A).
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