Acids & Bases Problem Set
Question 5. More pH Calculations
Tutorial to help answer the questionWhat is the pH of a 10 - 10 M solution of HCl?
Tutorial
pH of Solution with Very Dilute Acid| The negative log of 10 - 10 gives a pH of 10 -- which means that the solution is basic. Does it make sense that a very dilute acid would have the pH of a base?
In the case of a very dilute solution of an acid, water may make a greater contribution to [H +] than the dilute acid. In this problem, a 10 - 10 M solution of HCl contributes 10 - 10 M [H +]. The ionization of water contributes 10 - 7 M [H +]. The effective [H +] of this solution is 10 - 7 M and the pH=7. |
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Department of Biochemistry and Molecular Biophysics
The University of Arizona
January 6, 1999
Revised: October 2004
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