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);
Basics Of pH Control. FUNDAMENTAL CONSIDERATIONS. By definition, pH is the negative logarithm of the. hydrogen-ion concentration in aqueous solution. This. means that a solution having a pH value of 4 has ten. times more hydrogen ions than a solution whose pH is. 5. For control systems neutralizing spent acids or. bases, pH value per se is of little consequence except.