University:
California State University, Northridge
Course:
CHEM 101 | General Chemistry I
Academic year:

2023
Views:

325

Pages:

2
Author:

Myla N.

Solutions for Acids and Bases (Review) Exercises 1. 2. a) NaBr - neutral Na+ has no acidic or basic properties and since Br- is the conjugate base of a strong acid it is a nonbase. b) KC2H3O2 - basic K+ has no acidic or basic properties and since C2H3O2is the conjugate base of a weak acid it is a weak base. c) NH4Cl - acidic NH4+ is the conjugate acid of a weak base so it is a weak acid and since Cl- is the conjugate base of a strong acid it is a nonbase. d) Na3PO4 - basic Na+ has no acidic or basic properties and since PO43is the conjugate base of a weak acid it is a weak base. e) (CH3)4NCl - neutral Neither ion has acidic or basic properties. f) Fe(NO3)3 - acidic Fe3+ is a weak acid and since NO3- is the conjugate base of a strong acid it is a nonbase. (a) HI each of these reactants donates H+ (b) H2O 3. conjugate pairs acid base H3O+ H2O Solutions for Acids and Bases (Review) Exercises 4. CO2 from the atmosphere dissolves in the water and forms carbonic acid ( CO2 + H2O 6 H2CO3). 5. (a) HNO3 - strong acid 0.010 M HNO3 Y [H3O+] = 0.010 M Y pH = -log[H3O+] = 2.00 (b) KOH - strong base 0.035 M KOH Y [OH-] = 0.035 M Y [H3O+] = Kw/[OH-] = (1.0 x 10-14)/0.035 [H3O+] = 2.86 x 10-13 M Y pH = 12.54 6. common strong acids HCl H2SO4 alkali metal hydroxides HBr HNO3 quaternary ammonium hydroxide (R4NOH) HI HClO4 7. H2PO4-(aq) + H2O(l) HC2O4-(aq) + H2O(l) 8. common strong bases CN-(aq) + H2O(l) Ka2 º H3O+(aq) + HPO42-(aq) Kb2 º H2C2O4(aq) + OH-(aq) º HCN(aq) + OH-(aq)