1. ACID/BASE Theories & Review

2. What is the property of a base?
Bitter taste
Watery feel
Strong color
Unreactive
nonelectrolyte

3. What is the charge on the hydronium ion?2- 1- 1+ 2+

4. What is an acid according to Arrhenius?
a) A substance that ionizes to yield protons in aqueous solutions
b) A substance that is a hydrogen ion donor
c) A substance that accepts an electron pair
d) A substance that is a hydrogen ion acceptor
e) A substance that donates an electron pair

5. Which of these is an Arrhenius base?
LiOH
NH3
H2PO4-
HC2H3O2

6. What is transferred between a conjugate acid-base pair?
An electron
A proton
A hydroxide ion
A hydronium ion

7. In the reaction, NH4+ + H20  NH3 + H30+, water behaves as a(n)
Arrhenius acid
Arrhenius base
Bronsted-Lowry acid
Bronsted-Lowry base

8. In the reaction, CO32- + H20  HC03- + OH-, the carbonate ion behaves as a(n)
Arrhenius acid
Arrhenius base
Bronsted-Lowry acid
Bronsted-Lowry base

9. Which of the following represents a Bronsted-Lowry conjugate acid- base pair?
SO32- and SO2
CO32- and CO
H30 and H2
NH4+ and NH3

10. What does a buffer do? Keeps the pH of a solution constant
Keeps the salt concentration of a solution constant
Keeps the sodium concentration constant
Keeps the chloride concentration constant

11. If the hydroxide ion concentration is 10-10M, what is the pH of the solution?4 7 10 14

12. For a solution to be classified as acidic, the …
hydrogen-ion concentration must be M.
hydrogen-ion and hydroxide-ion concentration must be equal
hydrogen-ion concentration must be greater that the hydroxide-ion concentration
hydrogen-ion concentration must be 7M or greater

13. A solution in which the hydroxide-ion concentration is 1 x 10 –4 M is_________?
Acidic
Basic
Neutral
None of the above

14. What is the pH when the hydrogen ion concentration is 7.0 x 10 –3 M
1.9
2.2 3 4

15. What is the term used to describe a substance that can be both an acid and a base?
amphoteric
amphoprotric
Bronsted acid / base
Arrhenius acid / base