Stoichiometry Problem

Question

7.  How many moles of sodium acetate are produced if 3.58g of sodium phosphate are reacted with excess silver acetate?                    

                     AgC2H3O2   +  Na3PO4      Ag3PO4    +      Na C2H3O2

 

 

 

 

8. How many grams of hydrogen sulfide can be prepared if 5.20 moles of HCl are reacted? 

 

                                             FeS      +    HCl            FeCl2   +    H2S

Answer 1

7) Balanced reaction: 3 AgC₂H₃O₂ + Na₃PO₄ --> Ag₃PO₄ + 3 NaC₂H₃O₂.

(3.58g Na₃PO₄) * (1 mole Na₃PO₄ /163.94g Na₃PO₄) * (3 mole NaC₂H₃O₂ /1 mole Na₃PO₄) = 0.0655 mole NaC₂H₃O₂.

x) Balanced reaction: FeS + 2 HCl --> FeCl₂ + H₂S.

(5.20 mole HCl) * (1 mole H₂S /2 mole HCl) * (34.08g H₂S /1 mole H₂S) = 88.6g H₂S.