What is the molar mass of Pb(SO₄)₂? How is this value calculated?

The molar mass of lead(II) sulfate, represented as Pb(SO₄)₂, can be calculated by adding the atomic masses of all the atoms in the formula.

Components of Pb(SO₄)₂

This compound consists of one lead (Pb) atom, two sulfate (SO₄) groups. Each sulfate group contains one sulfur (S) atom and four oxygen (O) atoms.

Atomic Masses

• Lead (Pb): Approximately 207.2 g/mol
• Sulfur (S): Approximately 32.1 g/mol
• Oxygen (O): Approximately 16.0 g/mol

Calculating Molar Mass

To find the total molar mass, follow these steps:

• 1 Pb: 1 × 207.2 g/mol = 207.2 g/mol
• 2 S: 2 × 32.1 g/mol = 64.2 g/mol
• 8 O: 8 × 16.0 g/mol = 128.0 g/mol

Final Calculation

Now, add these values together:

207.2 g/mol + 64.2 g/mol + 128.0 g/mol = 399.4 g/mol

Result

The molar mass of Pb(SO₄)₂ is approximately 399.4 g/mol.