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A student observes that the pH in their mouth falls below 5.5 after eating sugary food. Which measure is most suitable for protecting tooth enamel from damage?

Answer and explanation

Correct answer: Brushing teeth with a basic toothpaste

The governing concept is pH, acidity, and neutralisation. Tooth enamel can begin to dissolve when the mouth becomes sufficiently acidic, commonly below about pH 5.5. A mildly basic toothpaste helps neutralise acids and removes food residues, reducing the harmful acidic condition. Lemon juice and carbonated drinks add more acids, while retaining more sugar encourages bacterial acid production. Thus brushing with basic toothpaste is the best option.

Related tags

Acids Bases SaltsPh ScaleTooth EnamelNeutralisationEveryday ChemistryAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And Behaviour

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