Praxis II General Science (5435) Practice Test

Table salt is chemically known as sodium chloride, which is represented by the formula NaCl. This compound consists of one sodium ion (Na⁺) and one chloride ion (Cl⁻) bonded together in a 1:1 ratio. Sodium chloride forms a crystalline structure that is essential for many biological functions, such as maintaining fluid balance and nerve transmission.

In contrast, potassium chloride (KCl), calcium chloride (CaCl₂), and magnesium chloride (MgCl₂) are all different types of salts with distinct chemical properties and uses, but they are not the same as table salt. Each of these compounds includes different cations—potassium, calcium, and magnesium—paired with chloride ions, leading to different applications and biological roles.