Mass of Al₂(SO₄)₃ : 4.822 g
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
2AlCl₃ + 3(NH₄)₂SO₄⇒Al₂(SO₄)₃+ 6NH₄Cl
MW AlCl₃ :133,34 g/mol
MW (NH₄)₂SO₄ : 132,14 g/mol
MW Al₂(SO₄)₃ : 342,15 g/mol
mol AlCl₃
[tex]\tt mol=\dfrac{12.93}{133.34}=0.097[/tex]
mol (NH₄)₂SO₄
[tex]\tt mol=\dfrac{10.34}{132.14}=0.078[/tex]
Limitng reactants (ratio mol : coefficient = the smaller)
AlCl₃ : (NH₄)₂SO₄ =
[tex]\tt \dfrac{0.097}{2}:\dfrac{0.078}{3}=0.0485:0.026[/tex]
(NH₄)₂SO₄ ⇒ limiting reactants
So mol Al₂(SO₄)₃ from (NH₄)₂SO₄
[tex]\tt \dfrac{1}{3}\times 0.078=0.026[/tex]
mass Al₂(SO₄)₃
[tex]\tt 0.026\times 342.15=8.896[/tex]
with 54.2% yield, the mass of Al₂(SO₄)₃
[tex]\tt 0.542\times 8.896=4.822~g[/tex]
