Lemon juice has a pH reading of about 2. How is it classified?

Lemon juice is classified as an acid due to its low pH value of around 2. The pH scale ranges from 0 to 14, with values below 7 indicating acidity and those above 7 indicating alkalinity. A pH of exactly 7 is considered neutral. Given that lemon juice has a pH well below 7, it demonstrates the characteristics of an acid, specifically a strong one due to its significant acidity.

While "weak acid" might suggest that it does possess some acidic properties, the pH value clearly indicates a stronger level of acidity than what would be considered weak. Further, substances classified as neutral or weak alkali do not fit the acidic nature demonstrated by the low pH of lemon juice. Therefore, calling lemon juice simply an "acid" accurately reflects its chemical properties and behavior in relation to the pH scale.