Calcium Phosphate Precipitation (Bone Mineral)

3CaCl₂ + 2Na₃PO₄ → Ca₃(PO₄)₂↓ + 6NaCl

Overview

Calcium chloride reacts with trisodium phosphate to form a white precipitate of calcium phosphate (Ksp = 2.1 × 10⁻³³). Calcium phosphate, particularly the hydroxyapatite form Ca₅(PO₄)₃OH, is the primary mineral component of bones and teeth. It accounts for about 70% of bone mass.

Participants

Role	Substance	Coefficient	State
Product	Sodium Chloride NaCl	6	(aq)

Everyday Example

Your bones and teeth are built from a form of calcium phosphate. Maintaining adequate calcium and phosphorus intake keeps this mineral being deposited.

Industrial Importance

Calcium phosphate is used in bone grafts and dental implants, as a food supplement, in ceramics, and as the raw material for phosphoric acid production.

Properties

Type: Precipitation
Reversible: No
Energy: Exothermic
ΔH: -105.0 kJ/mol

Related Reactions

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Carbonate Precipitation Calcium Fluoride Precipitation (Fluorite) Calcium Oxalate Precipitation (Kidney Stones) Calcium Sulfate Precipitation (Gypsum) Chromium(III) Hydroxide Precipitation Cobalt(II) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Calcium Phosphate Precipitation (Bone Mineral)?

The balanced equation is: 3CaCl₂ + 2Na₃PO₄ → Ca₃(PO₄)₂↓ + 6NaCl.

What type of reaction is Calcium Phosphate Precipitation (Bone Mineral)?

Calcium Phosphate Precipitation (Bone Mineral) is a precipitation reaction.

Is Calcium Phosphate Precipitation (Bone Mineral) exothermic or endothermic?

Calcium Phosphate Precipitation (Bone Mineral) is exothermic (releases energy). The enthalpy change (ΔH) is -105.0 kJ/mol.