Freelancing is not just a U.S. phenomenon, but is now spreading around the world. 1  There are approximatly 53 million freelancers in the U.S. contributing $715 billion in earnings to the national economy. 2  80% of all workers in the U.S. surveyed said they would do work on the side if it came to them to earn extra money.
pH value. A number denoting the degree of acidity or of basicity (alkalinity); 7 is a neutral value; acidity increases with decreasing values below 7; basicity increases with increasing values above 7.
To be technical, the term pH refers to the potential hydrogen-hydroxyl ion content of a solution. Solutions ionize into positive and negative ions. If the solution has more hydrogen (positive) ions than hydroxyl (negative) ions then it is an acid (1-6.9 on the pH scale). Conversely if the solution has more hydroxyl ions than hydrogen it is alkaline (or base), with a range of 7.1-14 on the pH scale.