1. Acids and Bases Test Review

2. Which of the following is a binary acid?
H2SO4
KOH
HBr
H2CO3
ans: HBr

3. The two members of a conjugate acid-base pair differ by a
water molecule.
hydroxide ion.
hydronium ion.
proton.
ans: proton (H+)

4. Calculate the pH of 0.0270 M KOH solution
12.4

5. If [H3O+] of a solution is greater than [OH-], the solution
is always acidic.
is always basic.
is always neutral.
might be acidic, basic or neutral.
ans: is always acidic.

6. For most purposes, the pH scale can be said to range from...
0 - 14

7. In the equation: HClO4 + NH3  NH4+ + ClO4- ClO4- is a weak base and HClO4 is a
Strong acid

8. If a substance has a great tendency to give up protons, its conjugate has a
great tendency to accept protons
slight tendency to give up protons
slight tendency to accept protons
ans: slight tendency to accept protons (weak base)

9. An aqueous solution of a weak acid contains
hydroxide ions
hydronium ions
water molecules
all of the above
ans: all of the above (just more hydronium ions than pure water or a base)

10. Which type of equation must be written in order to obtain pH from concentration of a base?
Neutralization equation
Acid ionization equation
Base ionization equation
Proton transfer equation
Ans: base ionization equation

11. If 39. 4 mL of. 0448 M hydrochloric acid is needed to neutralize 19
If 39.4 mL of M hydrochloric acid is needed to neutralize 19.3 mL of potassium hydroxide, what is [KOH]?
.0915 M KOH

12. The equivalence point of an acid-base titration is the point at which
acid and base are present in equal amounts.
acid and base are present in chemically equivalent amounts.
pH becomes 7.
the indicator changes color.
ans: acid and base are present in chemically equivalent amounts.

13. Bases taste
sour
bitter
sweet
soapy
ans: bitter

14. What is the hydroxide ion concentration for a solution whose pH is 7
2.51 x 10-7 M OH

15. Name the following: HCl hydrochloric acid H2SO4 sulfuric acid KOH potassium hydroxide H3PO4 phosphoric acid

16. What is the hydroxide concentration for a 2.88 x 10-4 M H2SO4 solution?
1.74 x M OH
Calculate pH for the same solution:
3.24

17. A water solution whose pH is 4
contains only water and hydronium ions.
contains only water and hydroxide ions.
contains water, hydronium and hydroxide ions.
would be dangerous to drink in small quantities.
ans: contains water, hydronium and hydroxide ions.

18. If a titration is performed with a strong acid and a weak base, the equivalence point would be expected to be
7.0
above 7.0
below 7.0
cannot be determined from the given information.
ans: below 7.0