What will be the pH value of a cup of black tea?

The pH value of a cup of black tea typically ranges from about 4.5 to 6.0, making it slightly acidic. This acidity is primarily due to the presence of tannins and other organic acids in the tea. Factors such as brewing time, temperature, and the type of tea leaves used can influence the exact pH level. Generally, the pH of black tea is lower than that of plain water, which has a neutral pH of around 7.0.