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Grade upto college level Physical Chemistry

A straight glass tube has two inlets X and Y at two ends. The length of tube is 200 cm. HCI gas through inlets X and NH3 gas through inlet Y are allowed to enter the tube at the same time. What fumes appear at point P inside the tube. Find distance of P from X.

Profile image of Amit Saxena
12 Years agoGrade upto college level
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1 Answer

Profile image of Navjyot Kalra
12 Years ago
Let NH­3 diffuse through = x cm
HCI diffuses through = y cm
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According to Graham’s law of diffusion
x/y = √Mol. wt HCI/Mol. wt of NH3 = √36.5/17 = 1.465
x = 1.465 y …(1)
x + y = 200 cm …(2)
From these equations; y = 85.2 cm
Distance between P and X = y = 85.2 cm.