[PDF] Practice Problems on Acid-Base Chemistry - Answers

2432_806_practice_problems_acids_bases_343_ans.pdf

Practice Problems on Acid-Base Chemistry - Answers 1. For each of the following acid base reactions place one of the arrows inside the box to designate the extent of the reaction. neither side favoredproduct favoredreactant favoredHNO3+NO3-+HNO2+HSO4-NO2-+H2SO4HSO3Cl+ClH2CCOO-SO3Cl+ClH2CCOOHH3CCOCH3+HClH3CCOCH3+Cl-HH3CCOCH3+NH2H3CCOCH2+NH3HS+H3O+H2S+H2OCN-+H3O+HCN+H2Oa)b)c)d)e)f)g)NH3NH4pKa = -1.3pKa = 9.24pKa = 3.29pKa ≅ -9.0pKa ≅ -3.1pKa = 2.86pKa = -2.9pKa = -7.0pKa = 26.5pKa = 38pKa = -1.74pKa = 7.0pKa = -1.74pKa = 9.3h)H2SO4+H3CCOCH3HSO4-+H3CCOCH3Hi)CH3OH2+CH3NCH3OH+CH3NH3j)HBr+CH3OHBr-+CH3OH2pKa ≅ -9.0pKa = -2.9pKa = -2.5pKa = 10.6pKa ≅ -9.0pKa = -2.5

2. Use curve-arrow notation to show electron flow in each of the following reactions and draw the structure of the product formed in each instance. a)

NH 2 +b) N +c) H 2 NOH +d) NH 2 H 2 NO + H 3 CH N NH 2 NH +e)f) NNH + (1 equivalent)(1 equivalent)g) NNH 2 + (1 equivalent) NH 3 NHH 3 NOHNH 3 H 2 NOH 3 CH N NH 2 NH 2

NNHHHOSO

2 Cl + OSO 2 Cl HI + I H Cl + Cl H Cl + Cl HOSO 2 Cl + OSO 2 Cl H Cl + Cl

HBrNNH

2 H + Br

3. Use curve-arrow notation to show electron flow in each of the following reactions and draw the structure of the product formed in each instance. Prepared by José Laboy a)+OCH

3 b)c)+d)+e)f)+NaH OOOOO OH NOO OH O h) OOO +HCO 3 - i) CCHH +NH 2 O 2 NCN

OH++OH

OOHHHHHHHHHHHOOOOOHNOOHHHO

2

NCNCCH

+CH 3 OH+H 2 O+H 2 O OOH +H 2 O+H 2 O O Na+H 2 (g) OOOH +H 2 CO 3 +NH 3