You react 105g of lithium nitride and excess water, and you get 48g of lithium hydroxide. What is the percent yield?

Percent yield = 22.26%

Explanation:

Given dа ta:

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%