Is decaf coffee acidic or alkaline?

Decaf coffee is slightly acidic, with a pH value of around 5.0. This is because coffee beans contain chlorogenic acids, which are a type of polyphenol. When coffee is brewed, these acids are extracted into the water, making the coffee acidic. Decaf coffee is made by removing the caffeine from coffee beans, but this process does not remove the chlorogenic acids. Therefore, decaf coffee is still slightly acidic.