Which of the following substances is considered neutral according to the pH scale?
Pure water
The pH scale ranges from 0 to 14, where a value of 7 indicates a neutral substance, values below 7 indicate acidity, and values above 7 indicate alkalinity.
Pure water has a pH of exactly 7 because it dissociates into equal concentrations of hydrogen (H+) and hydroxide (OH-) ions, making it neutral.
Sea water is mildly alkaline due to dissolved salts, while stomach acid and lime juice are both acidic due to hydrochloric acid and citric acid respectively.
Hence, pure water is considered neutral according to the pH scale.
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