Sample Questions - Chapter 10

Acids/Bases/Salts -
Theory and Rxns

Examples of
Multiple Choice Questions

1.: Arrhenius defined an acid as:; (a) a species that can donate a proton.; (b) a species that can accept a proton.; (c) a source of OH^- ions in water.; (d) a sourse of H⁺ ions in water.; (e) a species that can accept a pair of electrons.
2.: In the Bronsted-Lowry system, a base is defined as:; (a) a proton donor.; (b) a hydroxide donor.; (c) an electron-pair acceptor.; (d) a water-former.; (e) a proton acceptor.
3.: In the equation: HF + H₂O H₃O⁺ + F^-; (a) H₂O is a base and HF is its conjugate acid.; (b) H₂O is an acid and HF is the conjugate base.; (c) HF is an acid and F^- is its conjugate base.; (d) HF is a base and H₃O⁺ is its conjugate acid.; (e) HF is a base and F^- is its conjugate acid.
4.: For the system shown here: HOBr + OH^- H₂O + OBr^-
Bronsted would classify the base species as:; (a) OH^- and HOBr; (b) H₂O and OH^-; (c) OBr^- and OH^-; (d) OBr^- and HOBr; (e) H₂O and HOBr
5.: Which is the strongest acid?; (a) HClO₄; (b) HClO₃; (c) HClO₂; (d) HClO; (e) HF
6.: Which of these species is probably the weakest acid?; (a) HCl; (b) H₃PO₄; (c) H₂PO₄^-; (d) HPO₄^2-; (e) HNO₃
7.: Consider the neutralization reactions between the following acid-base pairs in dilute aqueous solutions:; (1) CH₃COOH + NaOH; (2) HNO₃ + Mg(OH)₂; (3) H₃PO₄ + Ba(OH)₂; (4) HCl + KOH; (5) H₂CO₃ + LiOH
For which of the reactions is the net ionic equation: H⁺ + OH^- H₂O ?; (a) 1, 3; (b) 1, 4, 5; (c) 2, 3; (d) 4; (e) 1
8.: Which one of the following represents the net ionic equation for the reaction of nitric acid with aluminum hydroxide?; (a) 3H⁺ + Al(OH)₃ Al³⁺ + 3H₂O; (b) 3HNO₃ + Al(OH)₃ Al(NO₃)₃ + 3H₂O; (c) HNO₃ + OH^- NO₃^- + H₂O; (d) H⁺ + OH^- H₂O; (e) 3NO₃^- + Al³⁺ Al(NO₃)₃
9.: Which one of the following is an amphoteric metal hydroxide?; (a) KOH; (b) Ba(OH)₂; (c) Pb(OH)₂; (d) LiOH; (e) Mg(OH)₂
10.: According to the Lewis theory, a base _____ .; (a) is a proton acceptor.; (b) is a proton donor.; (c) makes available a share in a pair of electrons.; (d) produces OH^- ions in aqueous solution.; (e) accepts a share in a pair of electrons.

Answers:

1. (d) 2. (e) 3. (c) 4. (c) 5. (a) 6. (d) 7. (d) 8. (a) 9. (c) 10. (c)

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