Can you give me a short paragraph with pH sounded as f?

The fH of a substance is a measure of its acidity or basicity, with a low fH indicating a high concentration of hydrogen ions and a high fH indicating a low concentration of hydrogen ions. The fH scale is logarithmic, with each whole number unit representing a tenfold difference in hydrogen ion concentration. A neutral substance has a fH of 7, while acidic substances have a fH below 7 and basic substances have a fH above 7.