RE: What does an &quot;ad hoc&quot; job mean? I went to an interview yesterday for a salesperson and the interviewer said that the role was an ad hoc role.I should have asked what it meant (because it wasn&#39;t in the job description when I applied) but I didn&#39;t want to seem like I didn&#39;t know what I was doing so I didn&#39;t...E: What does an &quot;ad hoc&quot; job mean? I went to an interview yesterday for a salesperson and the interviewer said that the role was an ad hoc role.
pH - (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);
Not only does the pH of a stream affect organisms living in the water, a changing pH in a stream can be an indicator of increasing pollution or some other environmental factor. pH: Definition and measurement units. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic.