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Below which pH does tooth decay become more likely?

Answer and explanation

Correct answer: About 5.5

Tooth enamel is mainly a mineral that can be attacked when the mouth becomes sufficiently acidic. Bacteria metabolise sugars and produce acids, lowering the pH around the teeth. When the pH falls below about 5.5, enamel demineralisation becomes more likely and the risk of tooth decay rises. A pH of 7 is neutral, while 10 and 14 are alkaline. Hence option A is correct.

Related tags

Tooth-DecayPhEnamelAcids-And-BasesAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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