any of the major appearances or aspects in which a thing of varying modes or conditions manifests itself to the eye or mind. 2. a stage in a process of change or development: Each phase of life brings its own joys. 3. a side, aspect, or point of view: This is only one phase of the question.
The pH of a neutral solution is 7. At this pH, the solution has equal concentrations of both the H+ and OH- ions, which is 10^-7 mole/litre. The presence of both the hydrogen and hydroxyl ions in equimolar concentrations makes the solution neutral.
PH is short for the power of Hydrogen. It's the measure of acidity or alkalinity in a solution. In pure water at 77Â°F, The hydrogen ions are equal to the concentration of hyd â¦ roxide ions. This is the neutral marking and means the pH level is 7.0.