Unit 27
Applications of Acids and Bases (Chapter 7)
•Acid Rain (7.8)
•Antacids (7.9)
•Acids/Bases in Industry (7.10)
•Acids/Bases in Health (7.10)
Still needs interesting stuff – acid rain pictures of
forest, statues, maps, sinkholes, etc.
Acid Strengths (7.4)
•Recall that an acid reaction with water may be written generally as:
HA (aq) +
H2O (ℓ) →
A- (aq)
+
H3O+ (aq)
•Any acid reacting with water will undergo the same sort of reaction but possibly to
a different degree. Acids may be classified as strong or weak depending on the
extent to which they break apart.
•Strong acids: A strong acid will undergo the reaction above to about 100% to form the A- and the
H3O+. The only seven strong acids are HCl, HBr, HI, HNO3, H2SO4, HClO3, and HClO4.
•Weak acids: A weak acid will only undergo the reaction above to small extent – maybe 5%. Acids
that are not one of the seven above will be classified as weak acids. Examples include HF, HNO2,
HC2H3O2, and others
Image from aidhyl.wordpress.com
Statue over entrance to castle in Westphalia, Germany built
in 1702. The left picture was taken in 1908 and the right
one in 1968.
Image from http://www.epa.gov
http://www.howstuffworks.com
Image from http://pubs.usgs.gov