What pH level defines an alkaline solution?

An alkaline solution is defined by a pH level that is greater than 7. This pH scale ranges from 0 to 14, where a pH of 7 is considered neutral, which is the pH of pure water. Solutions with a pH lower than 7 are acidic, while those that exceed 7 indicate a basic or alkaline solution. Alkaline substances have a greater concentration of hydroxide ions (OH-) compared to hydrogen ions (H+), contributing to their higher pH levels. Therefore, identifying a solution as alkaline requires recognizing that its pH is above the neutral point of 7.