If a solution can damage tooth enamel, in which pH range is it more likely to be?
Answer and explanation
Correct answer: Below 5.5
Tooth enamel is mainly a mineral containing calcium compounds, and acids can react with and gradually dissolve this mineral. When the pH in the mouth falls below about 5.5, the environment becomes sufficiently acidic for demineralisation of enamel to become significant, especially with repeated or prolonged exposure. Therefore option C is the most suitable range. A pH near 7 is approximately neutral, while values above 7 or near 14 are alkaline rather than acidic causes of typical enamel erosion.
Frequently asked questions
What is the correct answer to this question?
Below 5.5
Why is this the correct answer?
Tooth enamel is mainly a mineral containing calcium compounds, and acids can react with and gradually dissolve this mineral. When the pH in the mouth falls below about 5.5, the environment becomes sufficiently acidic for demineralisation of enamel to become significant, especially with repeated or prolonged exposure. Therefore option C is the most suitable range. A pH near 7 is approximately neutral, while values above 7 or near 14 are alkaline rather than acidic causes of typical enamel erosion.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
