Calculation Of Weight & Mole % Of Sulphur In 50g Of Sulphuric Acid

Data Given:

Mass or amount or quantity of H₂SO₄ = 50g

Requirement:

Percentage of Mass or weight of sulphur in 50g H₂SO₄ = ?

Percentage of Moles of sulphur in 50g H₂SO₄ = ?

Solution For Calculation:

As we know that

Number of Moles of H₂SO₄ = Mass / Molar Or Molecular Mass

Relative molecular mass (Mr) of H₂SO₄ = H₂ + S + O₄

Relative molecular mass (Mr) of H₂SO₄ = (2×1) + (1 × 32) + (4×16)

Relative molecular mass (Mr) of H₂SO₄ = 2 + 32 + 64

Relative molecular mass (Mr) of H₂SO₄= 98a.m.u

Now Putting the values in above equation

Number of Moles of H₂SO₄ = 50 / 98

Number of Moles of H₂SO₄ = 0.51 Answer.

Number Moles of S in 50 g H₂SO₄

H₂SO₄ : S

1 : 1

0.51: 1 :: 1 : x

0.51x = 1 × 1

X =

X = 1.96

Moles of sulphur is 1.96 moles in 50g of sulphuric acid (H₂SO₄).

Number Moles of S in 50 g H₂SO₄= (1.96 / 0.51) × 100

Number Moles of S in 50 g H₂SO₄ = 3.843 × 100

Number Moles of S in 50 g H₂SO₄ = 384.313%

Percentage of Mass or weight of sulphur in 50g H₂SO₄= (32 / 50) × 100

Percentage of Mass or weight of sulphur in 50g H₂SO₄ = 0.64 10

Percentage of Mass or weight of sulphur in 50g H₂SO₄= 64%

28 March 2015