What is the scale used to measure the acidity or alkalinity of a solution?

What is the scale used to measure the acidity or alkalinity of a solution?

• A. Kelvin scale
• B. pH scale
• C. Decibel scale
• D. Magnitude scale

Answer: (B)

The pH scale is specifically designed to measure the acidity or alkalinity of a solution, making it the correct answer. This scale ranges from 0 to 14, where values below 7 indicate acidity, a pH of 7 signifies neutrality, and values above 7 denote alkalinity. The scale quantitatively expresses the concentration of hydrogen ions (H⁺) in a solution; therefore, a lower pH corresponds to a higher concentration of hydrogen ions and, thus, increased acidity. Conversely, a higher pH reflects a lower hydrogen ion concentration and increased alkalinity. Other scales mentioned, such as the Kelvin scale, are unrelated to acidity and refer instead to temperature measurement. The decibel scale measures sound intensity, and the magnitude scale relates to measuring the energy released by earthquakes. Each of these scales serves a distinct purpose in their respective fields, which further emphasizes the unique role of the pH scale in chemistry and biology.

The pH scale is specifically designed to measure the acidity or alkalinity of a solution, making it the correct answer. This scale ranges from 0 to 14, where values below 7 indicate acidity, a pH of 7 signifies neutrality, and values above 7 denote alkalinity.

The scale quantitatively expresses the concentration of hydrogen ions (H⁺) in a solution; therefore, a lower pH corresponds to a higher concentration of hydrogen ions and, thus, increased acidity. Conversely, a higher pH reflects a lower hydrogen ion concentration and increased alkalinity.

Other scales mentioned, such as the Kelvin scale, are unrelated to acidity and refer instead to temperature measurement. The decibel scale measures sound intensity, and the magnitude scale relates to measuring the energy released by earthquakes. Each of these scales serves a distinct purpose in their respective fields, which further emphasizes the unique role of the pH scale in chemistry and biology.