Lithium nitride reacts with water to produce ammonia and lithium hydroxide accor

Question

Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation, Li_3 N(s) + 3 H_2O(l) rightarrow NH_3(g) + 3 LiOH(aq) Heavy water is water with the isotope deuterium in place of ordinary hydrogen, and its formula is D_2O. The above reaction can be used to produce heavy ammonia, ND_3(g), according to the equation, Li_3N(s) + 3D_2O(l) rightarrow ND_3(g) + 3LiOD(aq) Calculate how many grams of heavy water are required to produce 135.0 mg of ND_3(g). The mass of deuterium, D, is 2.014 g/mol.

Explanation / Answer

according to balanced reaction

20.05 gt ND3 require 3 x 20.03 g D2O

0.135 g (135 mg) nD3 require 0.135 x 3 x 20.03 / 20.05 = 0.404 g

mass of D2O required = 0.404 g

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