Answer:
Percent yield = 22.26%
Explanation:
Given data:
Mass of lithium nitride = 105 g
Mass of lithium hydroxide produces = 48 g
Percent yield = ?
Solution:
Chemical equation:
Li₃N + 3H₂O → 3LiOH + NH₃
Number of moles of lithium nitride :
Number of moles = mass/ molar mass
Number of moles = 105 g/ 34.83 g/mol
Number of moles = 3 mol
Now we will compare the moles of lithium nitride with lithium hydroxide.
Li₃N : LiOH
1 : 3
3 : 3×3 = 9 mol
Mass of lithium hydroxide:
Mass = number of moles × molar mass
Mass = 9 mol × 23.95 g/mol
Mass = 215.6 g
Percent yield:
Percent yield = actual yield / theoretical yield × 100
Percent yield = 48 g/ 215.6 g × 100
Percent yield = 22.26%
