Chemistry-General Name :

Review sheet : Ch. 19 ; Obj. 8-17-1 Date :

A. Answer true or false

_____ 1. Hydrogen atoms involved in nonpolar covalent bonds are likely to ionize.

_____ 2. Conjugate bases are particles formed when a base accepts a hydrogen ion.

_____ 3. Strong acids have a large Ka.

_____ 4. Weak bases have a large Kb.

_____ 5. Lewis bases donate an electron pair to form a bond.

_____ 6. Arrhenius acids form the hydroxyl ion in solution.

_____ 7. Ammonia(NH3) is an Arrhenius base (NH3 + H+ à NH4+).

_____ 8. NaOH is both an Arrhenius base and a Bronsted-Lowry base.

_____ 9. HCl is an Arrhenius acid.

_____ 10. HC2H3O2 is a Bronsted-Lowry acid

_____ 11. Sulfuric acid (H2SO4) is a diprotic acid.

_____ 12. The ionizable hydrogens of sulfuric acid will both ionize in a single step.

_____ 13. The first hydrogen of sulfuric acid will ionize more easily than the second hydrogen of sulfuric acid.

_____ 14. The second reaction below will have a larger Ka than the first reaction below.

(1) H2SO4 à HSO4- + H+

(2) HSO4- à SO42- + H+

_____ 15. Weak acids dissociate to a high degree and produce many hydrogen ions.

_____ 16. Strong acids produce few hydrogen ions because they dissociate to a small extent.

_____ 17. Strong acids ionize to a great extent.

_____ 18. The ionization of hydrofluoric acid dissociates according to the following reaction : HF « H+ + F-. The equation for the acid dissociation constant for HF is Ka= [H+][F-]/[HF].

_____ 19. For strong acids Ka is large (greater than 1).

_____ 20. Weak acids dissociate little and therefore have a small Ka (Less than 1).

21. Identify the acid(A), base (B), conjugate acid (CA) and conjugate base (CB) in the following reactions :

CN- + H2O « HCN + OH-

NH4+ + H2O « H3O+ + NH3

22. Label each reactant as a Lewis acid or a Lewis base

a.

b.