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,

Question 12 of 20 Map General Chemistr Donald McQuarrie. Peter A. Rock Ethan Gallogly University Science Books presented by Sapling Leaming iton Lithium nitride reacts with water to produce ammonia and lithium hydroxide according to the equation Li,N(s)-3H,O(l) NH3(g)+3Lioa(aq) Heavy water is water with the isotope deuterium in place of ordinary hydrogen, and its formula is D2O. The above reaction can be used to produce heavy ammonia, ND3(g), according to the equation Calculate how many grams of heavy water are required to produce 405.0 mg of ND3(g). The mass of deuterium, D, is 2.014 g/mol. Number Previous Give Up & View Solution Q, Check AnswerNext Exit Hint

Explanation / Answer

1.211 g of D2O would be required.

3 equivalents heavy water give 1 equivalent ND3

mol wt of  ND3 is 2.014 x 3 + 14.006 = 20.059 amu

mol wt of  D2O is 2.014 x 2 + 15.994 = 20.0074

3 x 20.0074 g D2O gives 20.059 ND3

hence by direct proprtionality to get 405 mg we require 3 x 20.0074 x 0.405 / 20.059 g

i.e. 1.211 g D2O

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