Chemistry answer needed

Question

Ammonium phosphate can be used as a fertilizer. 6.00 g of ammonium phosphate is dissolved in sufficient water to prepare 325 mL of solution.

In the first blank: What is the molar concentration of the ammonium phosphate?

In the second blank: What is the concentration of ammonium ions present?

Answer 1

The molar concentration of a solution is the number of moles of solute in a liter of solution.

Thus molar concentration = (grams of solute times 1000)/(molar mass of solute times 325)

The molar mass for Ammonium phosphate is (NH₄)₃PO₃ =(14+4)3+31+(16)3 =54+31+48 =133g/mol

Thus molar concentration = (grams of solute times 1000)/(molar mass of solute times 325)

=6.00(1000)/133(325) =0.1388mol/L

Since each mole of solvent has 3 moles of ammonium ions, the concentration of ammonium ions is 3 times this amount.