Defining Acids & Bases
Name _______________________________
15.1 Review
Period _____ Date ____________________
electrolyte
acid-base indicator
salt
hydronium ion
conjugate
neutralization reaction
amphoteric
1. An ionic compound that forms from an acid-base neutralization reaction is a(n) _________________
2. A(n) ________________________ is a substance that conducts electricity.
3. The chloride ion (Cl−) is the ______________________ base of hydrochloric acid (HCl).
4. The formula H3O+ represents a(n) _________________________.
5. A(n) ________________________ turns one color in an acidic solution and another color in a basic
solution.
6. The reaction between an acid and a base is called a(n) ________________________.
Directions: On the line at the left, write “A” if the statement is a property of an acidic solution. Write “B” if
it is a property of a basic solution, and write “X” if it is a property of both acidic and basic
solutions.
_____ 7. often feels smooth and slippery
_____ 8. has a sour taste
_____ 9. stings in open wounds
_____ 10. typically reacts vigorously with metals
_____ 11. has a bitter taste
_____ 12. turns litmus paper from blue to red
_____ 13. is an electrolyte
_____ 14. often looks like pure water
_____ 15. turns litmus paper from red to blue
_____ 16. typically does not react with metals
Directions: Answer the following questions in the space provided.
17. What is the Arrhenius definition of an acid? What is the Arrhenius definition of a base?
18. What is the Bronsted-Lowry definition of an acid? What is the Bronsted-Lowry definition of a base?
19. Why might NH3 not be considered a base according to the Arrhenius definition?
_____________________________________________________________________________________
20. Why is the Bronsted-Lowry definition of acids and bases more encompassing than the Arrhenius
definition?
_____________________________________________________________________________________
_____________________________________________________________________________________
21. Why is the H+ ion the same as a proton? _________________________________________________
_____________________________________________________________________________________
Directions: Determine the conjugate acid-base pairs in each of the following:
22.
NH3(aq)
+
H2O(l)

NH4+(aq)
+
OH-(aq)
23.
HNO2 (aq)
+
H2O (l)

H3O+(aq)
+
NO2−(aq)
24.
HCN(aq)
+
H2O(l)

H3O+(aq)
+
CN−(aq)
25.
H3PO4
+
OH-

H2PO4-
26.
H2PO4-
+
H2O

27.
H2PO4-
+
OH

+
H2O
HPO4-2
+
H3O+
HPO4-2
+
H2O