Dilutions with Strong Acids and Strong Bases

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Chapter 14 Homework
Dilutions with Strong Acids and Strong Bases:
1. If we have 1.00 M KOH, how much of this base will be needed to completely neutralize
38.0 mL of 1.00 M HCl?
2. If we have 10.0 M HCl, how much of this acid will be needed to completely neutralize
40.0 mL of 12.0 M NaOH?
Neutralization Reactions:
3. For the following pairs, write their neutralization reaction.
a.) Sr(OH)2(aq) and HI(aq)
b.) CsOH(aq) and HClO3(aq)
c.) LiOH(aq) and HBr(aq)
d.) NaOH(aq) and HNO3(aq)
4. For each of the following metals, write their balanced reaction for when they react with
HNO3.
a.) Al(s)
b.) K(s)
c.) Na(s)
d.) Mg(s)
Strong Acids and Bases vs. Weak Acids and Bases:
5. For each of the following acids listed below, state whether they are strong or weak.
a.) HCl(aq)
b.) H2CO3(aq)
c.) HClO3(aq)
d.) H2SO4(aq)
6. For each of the following bases listed below, state whether they are strong or weak.
a.) NH3(aq)
b.) NaOH(aq)
c.) NH4OH(aq)
d.) CsOH(aq)
7. For the following concentrations, determine [H3O+] for the strong acids, and state the
concentration that [H3O+] must be less than for the weak acids.
a.) 1.00 M HCl(aq)
b.) 2.50 M H2SO4(aq)
c.) 1.50 M CH3COOH(aq)
d.) 5.00 M HBr(aq)
8. For the following concentrations, determine [OH-] for the strong bases, and state the
concentration that [OH-] must be less than for the weak bases.
a.) 1.00 M NaOH(aq)
b.) 4.50 M NH4OH(aq)
c.) 1.50 M RbOH(aq)
d.) 2.30 M Ca(OH)2(aq)
BrØnsted-Lowry/Arrhenius Acids and Bases:
9. Define the following terms:
a.) BrØnsted-Lowry Acid:
b.) BrØnsted-Lowry Base:
c.) Arrhenius Acid:
d.) Arrhenius Base:
10. In the following reaction, state whether the acid is acting as a BrØnsted-Lowry acid or
an Arrhenius acid.
HCl(aq) + H2O(l) ? H3O+(aq) + Cl-(aq)
11. In the following reaction, state whether the base is acting as a BrØnsted-Lowry base or
an Arrhenius base.
HCl(aq) + NH3(aq) ? NH4+(aq) + Cl-(aq)
12. For the following substances, state whether they are an acid or base. Then write their
Arrhenius acid/base reaction to prove your answer.
a.) HI(aq)
b.) RbOH(aq)
c.) Ba(OH)2(aq)
d.) HClO3(aq)
BrØnsted-Lowry Acids/Bases & Conjugate Acids/Bases:
13. For each of the reactions below, identify the BrØnsted-Lowry acid and base. Label them
as B-Acid and B-Base.
a.) HCN(aq) + H2O(l) ? H3O+(aq) + CN-(aq)
b.) NH3(aq) + H2O(l) ? NH4+(aq) + OH-(aq)
c.) F-(aq) + H2O(l) ? HF(aq) + OH-(aq)
d.) H2CO3(aq) + H2O(l) ? HCO3-(aq) + H3O+(aq)
14. For each of the reactions below, identify the conjugate acid and conjugate base. Label
them as C-Acid and C-Base. **Hint: these reactions are the same as the previous problem, if
you labeled the B-Acids and B-Bases correctly, these should be easy!**
a.) HCN(aq) + H2O(l) ? H3O+(aq) + CN-(aq)
b.) NH3(aq) + H2O(l) ? NH4+(aq) + OH-(aq)
c.) F-(aq) + H2O(l) ? HF(aq) + OH-(aq)
d.) H2CO3(aq) + H2O(l) ? HCO3-(aq) + H3O+(aq)
15. For the following reactions, label the BrØnsted-Lowry acid and BrØnsted-Lowry base.
Then label the conjugate acid and conjugate base as well.
a.) HF(aq) + OH-(aq) ? F-(aq) + H2O(l)
b.) H3PO4(aq) + OH-(aq) ? H2PO4-(aq) + H2O(l)
c.) HCl(aq) + H2O(l) ? H3O+(aq) + Cl-(aq)
d.) CH3COOH(aq) + H2O(l) ? H3O+(aq) + CH3COO-(aq)
16. For the following pairs, state whether they are or are not conjugate acid-base pairs.
a.) NH3, NH4+
b.) H2CO3, CO32c.) H3PO4, H2PO4d.) HCl, Cl17. For the following pairs, state whether they are or are not conjugate acid-base pairs.
a.) HNO3, H2NO3+
b.) HClO4, ClO4c.) H2SO4, SO42d.) HBr, Br18. For the following acids listed below, write their conjugate base.
a.) HClO3
b.) H2SO4
c.) H2CO2
d.) H2CrO4
19. For the following bases listed below, write their conjugate acid.
a.) HC2O4b.) PO43c.) CH3COOd.) H2C2COOpH & pOH Calculations/Acidic vs. Basic Solutions:
20. If you are given a solution with a higher hydronium concentration when compared to
the hydroxide concentration, would this solution be acidic or basic? Explain.
21. For the following concentration pairs, state whether the solution is acidic, basic, or
neutral.
a.) [H3O+] = 1.00 x10-10 M; [OH-] = 1.00 x10-15 M
b.) [H3O+] = 1.00 x10-16 M; [OH-] = 1.00 x10-15 M
c.) [H3O+] = 1.00 x10-9 M; [OH-] = 1.00 x10-4 M
d.) [H3O+] = 1.00 x10-20 M; [OH-] = 1.00 x10-20 M
22. From the following hydronium concentrations, calculate the hydroxide concentration
present.
a.) [H3O+] = 2.0 x10-8 M
b.) [H3O+] = 1.5 x10-15 M
c.) [H3O+] = 1.8 x10-9 M
d.) [H3O+] = 4.0 x10-5 M
23. From the following hydroxide concentrations, calculate the hydronium concentration
present.
a.) [OH-] = 1.0 x10-8 M
b.) [OH-] = 2.5 x10-10 M
c.) [OH-] = 1.5 x10-12 M
d.) [OH-] = 1.0 x10-5 M
24. For each of the following pH values listed below, state whether they are acidic, basic, or
neutral.
a.) pH = 0.15
b.) pH = 4.89
c.) pH = 7.00
d.) pH = 14.00
25. For each of the following pH values listed below, state whether they are acidic, basic, or
neutral. Then state whether the hydronium or hydroxide concentration is higher in each of
the solutions.
a.) pH = 1.20
b.) pH = 10.00
c.) pH = 7.00
d.) pH = 3.50
26. Given the following hydronium concentrations, calculate the pH for each of the
solutions.
a.) [H3O+] = 1.0 x10-10 M
b.) [H3O+] = 2.7 x10-8 M
c.) [H3O+] = 1.0 x10-5 M
d.) [H3O+] = 3.0 x10-9 M
27. Calculate the pH for the following strong acids.
a.) [HCl] = 1.0 x10-5 M
b.) [HBr] = 3.5 x10-2 M
c.) [HNO3] = 2.0 x10-4 M
d.) [HI] = 4.0 x10-5 M
28. Calculate the pOH for the following hydroxide concentrations.
a.) [OH-] = 1.0 x10-13 M
b.) [OH-] = 2.5 x10-6 M
c.) [OH-] = 3.0 x10-5 M
d.) [OH-] = 5.0 x10-4 M
29. From the following pH values, determine the hydronium concentration.
a.) pH = 1.50
b.) pH = 4.00
c.) pH = 6.50
d.) pH = 3.88
30. From the following pOH values, determine the hydroxide concentration.
a.) pOH = 10.50
b.) pOH = 8.00
c.) pOH = 9.99
d.) pOH = 13.50
31. For the following hydroxide concentrations, determine the pOH and pH.
a.) [OH-] = 1.0 x10-8 M
b.) [OH-] = 2.5 x10-10 M
c.) [OH-] = 4.0 x10-9 M
d.) [OH-] = 3.8 x10-5 M
32. For the following hydronium concentrations, determine the pH and pOH.
a.) [H3O+] = 1.59 x10-13 M
b.) [H3O+] = 2.00 x10-10 M
c.) [H3O+] = 3.68 x10-10 M
d.) [H3O+] = 1.50 x10-12 M
33. Determine the pH for the following solutions.
a.) [HClO3] = 0.00321 M
b.) [KOH] = 0.0193 M
c.) [HI] = 0.000483 M
d.) [NaOH] = 0.148 M
34. Determine the pH from the following pOH’s, then state whether the solution is acidic,
basic, or neutral.
a.) pOH = 3.89
b.) pOH = 7.00
c.) pOH = 8.03
d.) pOH = 1.68
35. From the following pOH values listed below, circle the value that has the highest
hydroxide ion concentration.
a.) pOH = 4.00
b.) pOH = 5.73
c.) pOH = 1.54
d.) pOH = 13.89
Cumulative/Challenge Problems:
36. Fill in the missing spaces in the table below.
a.)
b.)
c.)
d.)
[H3O+] (M)
0.0059
[OH-] (M)
pOH
pH
0.048
3.50
12.00
Acidic or Basic
37. A 45.0 mL sample of 0.0100 M HCl was titrated with 15.0 mL of NaOH. Find the
concentration of the NaOH, and then (without doing pH calculations) determine whether
this titrated solution may be acidic or basic. Explain your reasoning.
38. Determine the pH of a solution that has [OH-] = 1.0 x10-5 M. Is the solution acidic or
basic?
39. Determine the pOH of a solution that has [H3O+] = 1.0 x10-11 M. Is the solution acidic or
basic?
40. All strong acids are monoprotic acids except for sulfuric acid. Explain why sulfuric acid
is considered a strong acid. How does it dissociate in water?
41. All acids have at least one hydrogen ion in their formula, but not all bases have at least
one hydroxide ion in their formula. From what you’ve learned so far in chemistry, try to
come up with an explanation for why this occurs.

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