Which of the following is a common fluoridation chemical?

Sodium fluoride is commonly used as a fluoridation chemical in water treatment processes to help prevent tooth decay. It is effective in remineralizing enamel and reducing the incidence of cavities, making it a popular choice for public water systems aiming to improve dental health in their populations.

The use of sodium fluoride in water fluoridation is supported by numerous public health organizations that advocate for its safe and effective role in dental health. It dissociates in water to release fluoride ions, which can be readily absorbed by teeth and interact with the enamel surface, contributing to stronger and healthier teeth.

In contrast, the other options—sodium bicarbonate, potassium chloride, and calcium carbonate—serve different purposes in water treatment and do not have the same efficacy in promoting dental health through fluoridation. Sodium bicarbonate is often used to adjust pH levels, potassium chloride is primarily used for water softening, and calcium carbonate is typically used for hardness stabilization rather than providing fluoride to combat dental issues.