Multiple Choice Questions for Acid Base and Solubility Equilibria

Multiple Choice Questions for Acid Base and Solubility Equilibria

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Multiple Choice Questions for Acid Base and Solubility Equilibria 1. According to the Brønsted–Lowry definition, which chemical species can function both as an acid and as a base? (A) Cl - (B) SO 4 2– (C) NH 4 + (D) HCO 3 (E) H 3 O + 2. Which is the strongest Brønsted base? (A) HOH (B) OH (C) Cl (D) O 2– 3. Given that H X is a stronger Brønsted acid than H Y in aqueous solution, which is true of a 1 M solution of Na X ? (A) It is less basic than a 1 M solution of Na Y . (B) It is more basic than a 1 M solution of Na Y . (C) It yields a neutral solution. (D) It is more concentrated than a l M solution of Na Y . 4. SnCl 4 accepts two electron pairs and acts as (A) a Brønsted acid. (B) an Arrhenius base. (C) a Lewis acid. (D) a Lewis base. 5. Which of these species is most likely to be a Lewis acid and is also least likely to be a Brønsted acid? (A) NH 4 + (B) BF 3 (C) H 2 O (D) OH 6. Which molecule or ion cannot act as a Lewis base? (A) Cl (B) H 2 O (C) NH 3 (D) BF 3 7. Which ion is the strongest Lewis acid? (A) Na + (B) F (C) Cl (D) Al 3+ 8. All are examples of Lewis acid–base reactions except (A) Cu 2+ (aq) + 4NH 3 (aq) [Cu(NH 3 ) 4 ] 2+ (aq) (B) HCl (g) + NH 3 (g) NH 4 Cl (s) (C) H + (aq) + OH (aq) H 2 O (l) (D) 2Na (s) + Cl 2 (g) 2NaCl (s) 9. Which hydrated metal ion is most acidic under conditions of equal molar concentration in water? (A) Al 3+ (B) Ba 2+ (C) K + (D) Zn 2+ (E) Ag + 10. Which element in Group 5A forms the most basic oxide? (A) N (B) P (C) As (D) Sb (E) Bi 11. When 50 mL of 0.1 M HCl is mixed with 50 mL of 0.2 M NaOH, the resulting hydronium ion concentration will be (A) 0.05 M. (B) l 10 –7 M. (C) 0.1 M. (D) 0.2 M (E) none of these 12. Assuming complete ionization, the pH of a 0.0005 M solution of Ca(OH) 2 is approximately (A) three. (B) seven. (C) eleven. (D) thirteen
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13. In which pair is the first member a stronger proton–donating acid than the second member? (A) HClO 4 , HClO 3 (B) H 2 SO 3 , H 2 SO 4 (C) HIO, HBrO (D) H 2 O, H 2 S 14. In which pair of acids is the first member stronger than the second? (A) HClO > HIO (B) H 3 PO 4 > HNO 3 (C) H 2 SO 3 > H 2 SO 4 (D) HBrO > HBrO 2 15. Which particles are present in the greatest number in a dilute sulfuric acid solution? (A) H 2 SO 4 molecules (B) H 3 O + ions (C) HSO 4 ions (D) OH ions (E)SO 4 2– ions 16. An element reacts with dilute HCl, forms an amphoteric hydroxide, and is commonly found in the +2 oxidation state. The element is probably (A) Zn (B) Na (C) Al (D) Cu 17. Zinc hydroxide is amphoteric, which means that (A) it can act as either a weak acid or a weak base. (B) it is insoluble in strong bases. (C) it is insoluble in strong acids. (D) it is highly colored. (E) it is used as a reducing agent. 18. Which statement is a logical inference from the fact that a 0.10 M solution of potassium acetate, KC 2 H 3 O 2 , is less alkaline than a 0.10 M solution of potassium cyanide, KCN? (A) Hydrocyanic acid is a weaker acid than acetic acid.
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Multiple Choice Questions for Acid Base and Solubility Equilibria

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