Calculate the weight of ammonia gas.
(a) Required for reacting with sulphuric acid to give 78 g. of fertilizer ammonium sulphate.
(b) Obtained when 32.6 g. of ammonium chloride reacts with calcium hydroxide during the laboratory preparation of ammonia.
[2NH₄Cl + Ca(OH)₂ ⟶ CaCl₂ + 2H₂O + 2NH₃]
[N = 14, H = 1, O = 16, S = 32, Cl = 35.5].

Question

Calculate the weight of ammonia gas.
(a) Required for reacting with sulphuric acid to give 78 g. of fertilizer ammonium sulphate.
(b) Obtained when 32.6 g. of ammonium chloride reacts with calcium hydroxide during the laboratory preparation of ammonia.
[2NH₄Cl + Ca(OH)₂ ⟶ CaCl₂ + 2H₂O + 2NH₃]
[N = 14, H = 1, O = 16, S = 32, Cl = 35.5].

KnowledgeBoat · Accepted Answer

(a) Molecular Weight of Ammonia (NH₃) = 14 + 3(1) = 17 g Molecular Weight of Ammonium Sulphate ((NH₄)₂SO₄) = 2[14 + 4(1)] + 32 + 4(16) = 132 g 132 g of ammonium sulphate is given by 34 g of ammonia 78 g of ammonium sulphate is given by x 78 = 20.09 g of ammonia Hence, 20.09 g of ammonia gas is required. (b) Molecular Weight of Ammonium Chloride (NH₄Cl) = 14 + 4(1) + 35.5 = 53.5 g 107 g of ammonium chloride gives 34 g of ammonia 32.6 g of ammonium chloride will give x 32.6 = 10.36 g of ammonia Hence, 10.36 g of ammonia gas is obtained.

Chemistry

Stoichiometry

Related Questions

Heat on lead nitrate gives yellow lead [II] oxide, nitrogen dioxide and oxygen. Calculate the total volume of NO₂ and O₂ produced on heating 8.5 of lead nitrate. [Pb = 207, N = 14, O = 16]

2KClO₃ ⟶ 2KCl + 3O₂ ; C + O₂ ⟶ CO₂. Calculate the amount of KClO₃ which on thermal decomposition gives 'X' vol. of O₂, which is the volume required for combustion of 24 g. of carbon. [K = 39, Cl = 35.5, O = 16, C = 12].

Sodium carbonate reacts with dil. H₂SO₄ to give the respective salt, water and carbon dioxide. Calculate the mass of pure salt formed when 300 g. of Na₂CO₃ of 80% purity reacts with dil. H₂SO₄. [Na = 23, C = 12, O = 16, H = 1, S = 32].

Sulphur burns in oxygen to give sulphur dioxide. If 16 g. of sulphur burns in 'x' cc. of oxygen, calculate the amount of potassium nitrate which must be heated to produce 'x' cc. of oxygen. [S = 32, K = 39, N = 14, O = 16].