The term that represents the concentration of hydrogen ions in a solution is?

The term that represents the concentration of hydrogen ions in a solution is?

• A. pH
• B. Molarity
• C. Alkalinity
• D. pOH

Answer: (A)

Hydrogen ion concentration determines how acidic a solution is, and the term that expresses this is pH. It is defined as pH = -log10[H+], so it directly reflects the amount of hydrogen ions present. A low pH means a high hydrogen ion concentration, while a high pH means a lower hydrogen ion concentration. The other terms don’t describe hydrogen ion concentration specifically: molarity is a general measure of solute per liter, alkalinity is the capacity to neutralize acids, and pOH gauges hydroxide ion concentration (with pH and pOH adding to about 14 at room temperature).

Hydrogen ion concentration determines how acidic a solution is, and the term that expresses this is pH. It is defined as pH = -log10[H+], so it directly reflects the amount of hydrogen ions present. A low pH means a high hydrogen ion concentration, while a high pH means a lower hydrogen ion concentration. The other terms don’t describe hydrogen ion concentration specifically: molarity is a general measure of solute per liter, alkalinity is the capacity to neutralize acids, and pOH gauges hydroxide ion concentration (with pH and pOH adding to about 14 at room temperature).