Final answer:
Hydroxyapatite is a biological compound that contains both calcium phosphate and calcium sulfate. This compound adheres to collagen fibers in bones, giving them hardness and strength. Calcium phosphate (Ca3(PO4)2) also serves as an anti-caking agent in food products.
Step-by-step explanation:
The biological compound composed of 25% Calcium phosphate and 75% Calcium Sulfate is hydroxyapatite, which is found in bone tissue. In hydroxyapatite, the calcium phosphate and calcium sulfate, along with other elements, crystallize on collagen fibers giving bones their hardness and strength while allowing flexibility. The molar solubility of calcium phosphate at 25°C indicates the levels at which it dissolves to form ions in a solution, which, in the case of hydroxyapatite, are important for the crystallization process that occurs in bone formation. Additionally, calcium phosphate, specifically Ca3(PO4)2, is also known as an anti-caking agent in foods.