EFFECT OF HEAT ON THE PH OF WATER AND DYE SOLUTIONS.
Abstract
The acidity of distilled water is usually attributed to dissolved carbon dioxide, and the carbon dioxide can be removed by boiling whereby the pH of the water returns to 7.0. Recently, the author has observed some interesting phenomena in experiments related to water and dye solutions (1). Freshly distilled water has a pH between 5.0 and 6.0, not 7.0 (2). When the temperature is raised from 20C to 100C, the pH will increase by 2.0 units, regardless of whether it is ordinary or specially distilled water. That is to say, if the pH of the water is 5.0 at 20C, it will be 7.0 at 100C and if it is 5.5 at 20C it becomes 7.5 at 100C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 28, 1965
- Accession Number
- AD0625794
Entities
Organizations
- National Air and Space Intelligence Center