pH Notes

1. pH NOTES

2. What is “pH”?
•The term "pH" was invented in
1909 by the Danish chemist
Soren Sorensen
•pH was originally written by Dr
Sørensen as pH, and it stands
for pondus hydrogenii which
means "potential hydrogen". The
terminology refers to acidity
being due to a predominance of
hydrogen ions in an aqueous
(water containing) solution.

3. Acids and Bases
Acid = compounds that release hydrogen
ions (H
+
) in solution. (ex. HCl)
Base = produce OH
-
ions in solution (ex.
sodium hydroxide)
Acid Base

4. pH scale
pH scale = the scale of acidity or
basicity from 1 to 14.
1 (strong acid) 14 (strong base)
7 (neutral) [H
+
] = [OH
-
]

5. High OH
-
Concentration
Low OH
-
Concentration

6. High OH
-
Concentration
Low OH
-
Concentration