Calculate the molecular mass of CuSO₄·5H₂O.

To calculate the molecular mass of copper(II) sulfate pentahydrate (CuSO₄·5H₂O), we need to find the molar masses of each component and then sum them up.

Components of CuSO₄·5H₂O

• Copper (Cu): 63.55 g/mol
• Sulfur (S): 32.07 g/mol
• Oxygen (O) in sulfate (SO₄): 4 × 16.00 g/mol = 64.00 g/mol
• Water (H₂O): 5 × (2 × 1.01 g/mol + 16.00 g/mol) = 5 × 18.02 g/mol = 90.10 g/mol

Calculating the Total Molecular Mass

Now, we can add these values together:

Molecular mass of CuSO₄ = 63.55 g/mol (Cu) + 32.07 g/mol (S) + 64.00 g/mol (O) = 159.62 g/mol

Molecular mass of 5H₂O = 90.10 g/mol

Total molecular mass of CuSO₄·5H₂O = 159.62 g/mol + 90.10 g/mol = 249.72 g/mol

Final Result

The molecular mass of copper(II) sulfate pentahydrate (CuSO₄·5H₂O) is 249.72 g/mol.