Question

What mass of Ag3PO4 (molar mass= 418.5754 g/mol) is produced from the combination of 25.0 mL of 1.20M AgNO3 with 35.0 mL of 0.800 M K3PO4? This is a limiting reactant problem.

_AgNO3 (aq) + _K3PO4(aq) ---> _Ag3PO4 (s) + __KNO3 (aq)

A). 13.2

B). 18.9

C). 4.19

D). 7.69

E). 2.12

Answer 1

The balanced chemical equation is
  
Number of moles of silver nitrate   
Number of moles of potassium phosphate
0.03 moles of silver nitrate will react with 0.01 moles of potassium phosphate. However 0.028 moles of potassium phosphate are present.

Since, the number of moles of potassium phosphate are more than the number of moles of silver nitrate, potassium phosphate is the excess reagent reagent and silver nitrate is the limiting reagent.
0.03 moles of silver nitrate will react with 0.01 moles of potassium phosphate to form 0.01 moles of silver phosphate. The molar mass of silver phosphate is 418.5754 g/mol. The mass of silver phosphate is