What is the molecular formula of Calcium Phosphate? 

The correct answer is Ca3(PO4)2

Key Points

• Calcium Phosphate refers to a group of compounds that contain Calcium ions (Ca⁺²) and inorganic phosphorous anions and is found in milk, bones and teeth.
• It is also called Tricalcium phosphate and appears as a white odourless amorphous or crystalline powder and is tasteless.
• It is insoluble in ethanol and acetic acid but soluble in dilute nitric acid and hydrochloric acid (HCl).
• It can be produced by reacting Phosphoric acid (H₃PO₄) and solid Calcium Hydroxide (Ca(OH)₂).
• The chemical formula of Calcium Phosphate is Ca3(PO4)2. Hence option 3 is correct.
• Calcium phosphate is used as an antacid and dietary supplement in medicine, used as calcium replenishment, as a stabilizer in plastics, manufacturing of milk glass etc. 

Additional Information

• Calcium Orthophosphates (CaPO₄) are major mineral constituents of bones, and teeth (inorganic) and pathological calcified tissues of mammals.
  • They contain three major chemical elements like Calcium, Phosphorous and Oxygen.
• Calcium phosphate makes up the bulk of animal mineral nutrient requirements for filling both body tissues and milk needs.
• The calcium salt of phosphoric acid, calcium phosphate has a wide range of applications. It can be used to protect against strontium and radium radioactive exposure.
  • To neutralize the pH value, the phosphate ions in calcium phosphate react with Hydrochloric acid (HCl) in the stomach.
• Calcium phosphate is a source of calcium and phosphate ions that assist dental demineralization and bone homeostasis in toothpaste and systemic circulation.