Determine the volume fraction of ammonia in its gas mixture with air, if it is known that 2.913 liters of a 4.9% sulfuric acid solution with a density of 1.03 g / ml (the reaction product is a medium salt) were consumed to neutralize 150 liters of this mixture.
1) Let’s compose the reaction equation:
2NH3 + H2SO4 = (NH4) 2SO4
2) Calculate the mass and amount of sulfuric acid substance:
ρ = m / V
V (H2SO4) = 2.913 L = 2913 ml
m (solution) = ρ (H2SO4) ∙ V (H2SO4) = 1.03 ∙ 2913 = 3000 g.
m (H2SO4) = (m (solution)) ∙ ω (H2SO4) / 100% = 3000 ∙ 4.9 / 100 = 147 g.
n (H2SO4) = m (H2SO4) / M (H2SO4) = 147/98 = 1.5 mol.
3) Determine the amount of substance and the volume fraction of ammonia:
According to the reaction equation:
n (NH3) = 2n (H2SO4) = 2 ∙ 1.5 = 3 mol
V (NH3) = n (NH3) ∙ Vm = 3 • 22.4 = 67.2 liters.
φ (NH3) = V (NH3) / V (mixture) = 67.2 / 150 = 0.448 = 44.8%
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.