Chapter 15

Homework #1
Problems p.477-478 # 8, 9,13,14, 17, 18, 19, 20, 26, 28, 30, 33, 36,

8. Monoprotic acids, such as HCl, can denote only one proton per molecule;
diprotic acids, such as H2SO4, can denote two protons per molecule; and
triprotic acids, such s H3PO4, can donate three protons per molecule.

9. a. A conjugate base remains after an acid has given up a proton.
Ex. HF + H2O --> H3O+ + F-
b. a conjugate acid is what forms when a proton is added to a base
Ex. Base: H2O; conjugate acid; H3O+

13. a. Acid: CH3COOH, conjugate base: CH2COO-; base: H2O, conjugate acid H3O+
b. Acid: H2O, Conjugate base OH-; base HCO3-, conjugate acid: H2CO3
c. Acid: HNO3, conjugate base: NO3-: base: SO4 2, conjugate acid HSO4-

14. a. HNO3
b. H2S
c. HS-
d. NO3-

17. a. Hydrochloric acid
b. hydrosulfuric acid
18. a. nitric acid
b. sulfurous acid
c. chloris acid
d. nitrous acid

19. a. HF
b. HI

20. a. HBrO4
b. HClO2
c. H3PO4
d. HClO

26. a. HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l)
H3O+(aq) + Cl-(aq) + Na+(aq) + OH-(aq) --> Na+(aq) + Cl-(aq) + 2H2O(l)
H30+ (aq) + OH-(aq) --> 2H2O(l)

b. HNO3(aq) + KOH(aq) --> KNO3(aq) + H2O (l)
H3O+(aq) + NO3-(aq) + K+(aq) + OH-(aq)-->K+(aq) + NO3-(aq) + 2H2O(l)
H3O+(aq) + OH-(aq)--> 2H2O(l)

c. Ca(OH)2(aq) + 2HNO3(aq) --> Ca(NO)2(aq) + 2H2O(l)
Ca2+(aq) + 2OH-(aq) + 2H3O+(aq) + 2NO3-(aq) --> Ca+2(aq) + 2NO3-(aq) +4H2O(l)
H30+ (aq) + OH-(aq)--> 2H2O(l)

d. Mg(OH)2(aq) + 2HCl(aq) --> MgCl2(aq) + 2H2O (l)
Mg+2(aq) + 2OH-(aq) + 2H3O+(aq) + 2Cl-(aq)--> Mg+2(aq) + 2Cl-(aq) + 4H20(l)
H30+ (aq) + OH-(aq)--> 2H2O(l)

28. a. BaCo3(s) + 2HCl (aq) --> BaCl2(aq) + H2O(l) + CO2(g)
b. MgCO3(s) + 2HNO2(aq)-->Mg(NO3)2 + H2O(l) + CO2(g)
c. Na2Co3(s) + H2SO4(aq)--> Na2SO4(aq) + H2O(l) + CO2(g)
d. 3CaCO3(s) + 2H3PO4(aq) --> Ca3(PO4)2(aq) + 3H2O(l) + CO2(g)

30. a. 96.9g ZnSO4
b. 13.4 L H2

33. a. HNO3(aq) + LiOH(aq) à LINO3(aq) + H2O(l)
b. H3O+(aq) + NO3-(aq) +Li+(aq) + OH-(aq)à Li+(aq) + NO3- (aq) +
2H2O(l)
c. H30+ (aq) + OH-(aq) à 2H2O(l)

36. a. Hydrofluoric acid
b. CH3COOH
c. H3PO3
d. perchloric acid
e. Phosphoric acid
f. HBr
g. hypochlorous acid
h. Carbonic acid
i. H2SO4

Chapter 16
Section Review on p. 503:
1. Methl orange and bromphenol blue
b. Phenolphthalein and phenol red
2. HCl, H2SO4 and CH3COOH
3. 6.67ee-3 M NaOH
4. 0.33 HCl

HW on p. 504 Reviewing Concepts: # 1,6,7,10 &14, Problems
#15,16,17,18,19,20,21,22,23,24,&38

1. water undergoes self-ionization

6. a. neutral
b. basic
c. neutral
d. acidic
e. neutral
f. acidic
g. basic

7. g,b,c,e,f,d,a,I,h,

10. a. by using a pH meter
b. a rapid change in pH occurs.

14. approximately 8

15. a. [H3O+] = 3x10^-2M
[OH-]= 3x10^-13 M
b. [H3O+] = 1x10^-10 M
[OH-] = 1x10^ -4 M
c. [H3O+] = 1x10^-2 M
[OH-] = 1x10^ -12 M
d. [H3O+] = 5x 10^-13 M
[OH-]= 2x10^-2 M

16. a. 2.00
b. 3.00
c. 5.00
d. 4.00

17. a. 8.00
b. 5.00
c. 12.00
d. 7.00

18. a. 12.00
b. 11.00
c. 10.00

19. a. 4.70
b. 6.33
c. 2.42

20. a. 1x10^-3
b. 1.0x10^-7
c. 1x 10^-11
d. 1x10^-5

21. a. 1.0 x10^-7
b. 1.0 x10^-3
c. 1.0x 10^-10
d. 1.0 x 10^-8

22. a. 5.9 x 10^-5
b. 2.2 x 10^-8
c. 3.3x 10^-10

23. a. 2.0x 10^-3
b. 5.0 x 10 ^-12
c. 1.1 x 10^-12
d. 0.69 g HNO3
e. 0.70 mL concentrated acid

24. a. 1.0 mol NaOH
b. 0.75 mol HNO3
c. 0.10 mol Ba(OH)2
d. 0.90 mol H2SO4

38. The sudden changes of pH at about 25 mL and 50 mL indicate a diprotic
acid. The first change indicates the depletion of the first H+ that
dissociates, and the second change indicated the depletion of the second H+.
The pH ends near 13, which corresponds to that of a .01 M NaOH solution.