Question

Liquid ammonia (NH3) can react with sulfuric acid to form an important fertilizer, ammonium sulfate. A. Indicate the molar mass of the wanted and given substances B. What mass of ammonium sulfate can be produced from the reaction of 35.5g of ammonia with excess sulfuric acid

Answer 1

A. Mr(NH₃)= 14+3=17 g/mol;

Mr((NH₄)₂SO₄)=2*18+96=132 g/mol;

B. 2NH₃ + H₂SO₄ => (NH₄)₂SO₄ ;

Proportion: m(NH₃)/2*Mr(NH₃)=m((NH₄)₂SO₄)/Mr((NH₄)₂SO₄) ;

m((NH₄)₂SO₄)= m(NH₃)*Mr((NH₄)₂SO₄)/2*Mr(NH₃)=35.5*132/(2*17)=137.82 g;