MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent ConceptStrength of Solution
NH3 is produced according to the following reaction: N2(g) + 3H2(g) -> 2NH3(g) In an experiment 0.25 mol of NH3 is formed when 0.5 mol of N2 is reacted with 0.5 mol of H2. What is % yield ?
A.75%✓ Correct
B.50%
C.33%
D.25%
Explanation
Consider the reaction, 2 2 3 3 2 N H NH -> From the reaction, 1 mole of 2 N reacts with 3 moles of 2 H 0.5 mole of 2 N will react with 3 0.5 x i.e. 1.5 moles of 2 H Moles given of 2 H i.e. 0.5 is less than the required i.e. 1.5 2 H is limiting reagent From the reaction, 3 moles of 2 H forms 2 moles of 3 NH 0.5 moles of 2 H will form 2 0.5 3 x i.e. 0.33 moles of 3 NH The expected moles of 3 0.33 NH But, The actual moles of 3 0.25 NH MOLE & EQUIVALENT CONCEPT 40 % yield 0.25 100 75.75 0.33 x % The correct option is (a)
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