What is the pH level of bases in comparison to acids?

The correct answer indicates that bases have a pH level above 7. The pH scale, which ranges from 0 to 14, is used to measure the acidity or alkalinity of a solution. A pH level of 7 is considered neutral, which is the pH level of pure water. Acids have a pH level below 7, indicating they are more concentrated with hydrogen ions (H+), while bases, or alkaline substances, have a pH level above 7 due to a higher concentration of hydroxide ions (OH-).

Understanding the pH levels helps in identifying the nature of substances based on their behavior in chemical reactions and their effects on biological systems. The classification of bases as having a pH above 7 is fundamental in chemistry and provides insight into their basic properties and how they can neutralize acids.