Here's a breakdown:
* pH stands for "power of hydrogen" and measures the concentration of hydrogen ions (H+) in a solution.
* Acidic solutions have a higher concentration of H+ ions and a pH value below 7.
* Alkaline (basic) solutions have a lower concentration of H+ ions and a pH value above 7.
* Neutral solutions have an equal concentration of H+ and OH- ions and a pH value of 7.
The pH scale is logarithmic, meaning that each whole number change represents a tenfold change in acidity or alkalinity. For example, a solution with a pH of 4 is ten times more acidic than a solution with a pH of 5.
