While the most valuable football cards may not command the same prices as baseball or basketball cards, prices have soared during the last decade with collectors of vintage football cards coming on strong.
**The pH scale is a measure of the hydrogen ion concentration. It spans from 0 to 14 with the middle point (pH 7) being neutral (neither acidic or basic).Any pH number greater than 7 is considered a base and any pH number less than 7 is considered an acid. 0 is the strongest acid and 14 is the strongest base.*The pH scale is a measure of the hydrogen ion concentration. It spans from 0 to 14 with the middle point (pH 7) being neutral (neither acidic or basic).
The pH level is a quantitative measure of the hydrogen ions representing the acidity or alkalinity of a solution. The acidic solution has more free hydrogen ions and the alkaline solution has fewer free hydrogen ions. Any substance that lowers pH is an acid and any substance that raises it is a base.