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Acids, Bases and Salts — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryAcids, Bases and Salts3 Marks
Question
How does tooth enamel get damaged? What should be done to prevent it?
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Answer

Substances like chocolates and sweets are degraded by bacteria present in our mouth. When the p H falls to 5.5 tooth decay starts. Tooth enamel is the hardest substance in our body and it gets corroded. The saliva produced by salivary glands is slightly alkaline, it helps to increase the p H , to some extent, but tooth paste which contain basic substance is used to neutralize excess acid in the mouth.

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