The Grass Doctor

Write chemical equations to represent the formation of:ammonium phosphate, ammonium nitrate and urea?

Calculate the percentage of nitrogen in 1 mole of the above fertilizers. [ Relative atomic mass: H, 1; C,12; N,14; O, 16; P, 31; S, 32 ] Which of the above fertilizer is the most suitable for the growth of plants? Explain your answer. why urea is most suitable? can u explain 4 me

Public Comments

1. 1. 3NH3 + H3PO4 >> (NH4)3PO4 MM = 149 g/mol in 1 mole there are 3 N ( 14 x 3 = 42) % = 42 x 100 / 149 = 28.2 % 2. HNO3 (aq) + NH3 (g) >> NH4NO3 (aq) MM = 80 g/mol % = 28 x 100 / 80 = 35 3. two reactions take place in the formation of urea from NH3 and CO2 a) 2 NH3 + CO2 >> H2NCOONH4 ( ammonium carbamate ) b) H2NCOONH4 >> (NH2)2CO MM = 60 g/mol % = 28 x 100 / 60 = 46.7 Urea is the most suitable
2. 3 NH4OH + H3PO4 -> (NH4)3PO4 + 3 H2O NH4OH + HNO3 -> NH4NO3 + H2O NH4CNO -> NH2CONH2 Most suitable (long term) is urea.