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.