Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.50 mol H2O. What is the mole fraction of NH3 in concentrated aqueous ammonia?
mols NH3 = ?
mols H2O = ?
XNH3 = mols NH3/total mols
To find the mole fraction of NH3 in concentrated aqueous ammonia, we need to calculate the total number of moles of NH3 and H2O in the solution.
The mole fraction of a component (in this case, NH3) is the ratio of the moles of that component to the total moles in the solution.
Given:
- Moles of NH3 (NH3) = 1.00 mol
- Moles of H2O = 2.50 mol
First, we calculate the total moles in the solution:
Total moles = Moles of NH3 + Moles of H2O = 1.00 mol + 2.50 mol = 3.50 mol
Next, we calculate the mole fraction of NH3:
Mole fraction of NH3 = Moles of NH3 / Total moles
Mole fraction of NH3 = 1.00 mol / 3.50 mol ≈ 0.286
Therefore, the mole fraction of NH3 in concentrated aqueous ammonia is approximately 0.286.