Question

Calculate the molar mass of calcium phosphate.

Answer 1

1. Molar mass is the sum of the masses of all the individual atoms present in a molecule or compound.
2. The chemical formula of calcium phosphate is ${\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2$.
3. The atomic mass of calcium Ca is 40 u.
4. The atomic mass of phosphorous P is 31 u.
5. Atomic mass of Oxygen O is 16 u.
6. $\mathrm{Molecular}\mathrm{mass}\mathrm{of}\mathrm{calcium}\mathrm{phosphate}{\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2=(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{calcium}\mathrm{Ca})\mathrm{x}3+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{phosphorous}\mathrm{P})\mathrm{x}2+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Oxygen})\mathrm{x}8$
7. $=(40\mathrm{x}3)+(31\mathrm{x}2)+(16\mathrm{x}8)$
8. $=310\mathrm{g}$

The molecular mass of calcium phosphate is ${\mathrm{Ca}}_3{\left({\mathrm{PO}}_4\right)}_2$ 310g.