21.3. Acid and Base Strength http://www.ck12.org
- Describe the difference between a weak acid and a weak base. How does the Kbvalue for a given base
correspond to base strength? - Identify each of the following compounds as a strong acid, strong base, weak acid, or weak base:
a. HCl
b. KOH
c. HF
d. (CH 3 ) 2 NH
e. CH 3 CH 2 COOH - Calculate the pH of a 0.65 M solution of HF (Ka= 7.1 x 10−^4 ).
- Calculate the pH of a 0.25 M solution of acetic acid (Ka= 1.8 x 10−^5 ).
- A 0.10 M solution of a weak acid gave a pH reading of 4.2. Calculate the hydrogen ion concentration, then
determine Kafor the unknown acid. - Give a few examples of strong and weak acids, and a few examples of strong and weak bases.
Further Reading/Supplementary Links
- Strong and weak acids and bases: http://www.chemteam.info/AcidBase/Strong-Weak-AcidBase.html
- Calculating Kavalues: http://www.chemteam.info/AcidBase/Calc-Ka-from-data.html
Points to Consider
What would happen if you combined a strong acid and a strong base?