📘 Molar Mass Calculation
Step 1: Write the molecular formula
H₂SO₄
The formula contains:
- 2 Hydrogen (H) atoms
- 1 Sulphur (S) atom
- 4 Oxygen (O) atoms
Step 2: Write the atomic masses
H = 1 g mol⁻¹
S = 32 g mol⁻¹
O = 16 g mol⁻¹
S = 32 g mol⁻¹
O = 16 g mol⁻¹
🎬 Atomic Mass Animation
H
H
+
S
+
O
O
O
O
Each atom contributes its atomic mass to the total molar mass.
Step 3: Calculate the contribution of each element
Hydrogen:
2 × 1 = 2 g mol⁻¹
Sulphur:
1 × 32 = 32 g mol⁻¹
Oxygen:
4 × 16 = 64 g mol⁻¹
2 × 1 = 2 g mol⁻¹
Sulphur:
1 × 32 = 32 g mol⁻¹
Oxygen:
4 × 16 = 64 g mol⁻¹
Step 4: Add all contributions
Molar Mass of H₂SO₄
= (2 × 1) + (1 × 32) + (4 × 16)
= 2 + 32 + 64
= 98 g mol⁻¹
= (2 × 1) + (1 × 32) + (4 × 16)
= 2 + 32 + 64
= 98 g mol⁻¹
🎬 Final Calculation
H₂ + S + O₄
→
2 + 32 + 64
→
98 g mol⁻¹
✅ Final Answer
Molar Mass of H₂SO₄ = 98 g mol⁻¹
Therefore, one mole of H₂SO₄ has a mass of 98 grams.
🎯 Quick Method
Molar Mass
=
Σ (Number of Atoms × Atomic Mass)
H₂SO₄ = (2×1) + (1×32) + (4×16)
= 98 g mol⁻¹
H₂SO₄ = (2×1) + (1×32) + (4×16)
= 98 g mol⁻¹
