What type of solution has a pH greater than 7?

A solution with a pH greater than 7 is classified as basic, also known as alkaline. The pH scale ranges from 0 to 14, where values less than 7 indicate acidity, values equal to 7 signify neutrality, and values greater than 7 indicate a basic solution.

Basic solutions have a higher concentration of hydroxide ions (OH-) compared to hydrogen ions (H+), which accounts for their higher pH. Common examples of basic substances include sodium hydroxide (NaOH) and ammonia (NH3). Understanding the properties of basic solutions is vital in marine applications, where the maintenance of pH can impact corrosion rates and overall material performance.