1. What is Copper(II) Sulfate?

Copper(II) sulfate (CuSO₄) is an inorganic compound that exists as a series of compounds that differ in their degree of hydration. The anhydrous form is a pale green or gray-white powder, while the pentahydrate (CuSO₄·5H₂O) is bright blue.

2. Molar Mass Calculation

The molar mass of anhydrous CuSO₄ is calculated as:

Where:

• 63.546 g/mol — Atomic mass of Copper (Cu)
• 32.066 g/mol — Atomic mass of Sulfur (S)
• 15.999 g/mol — Atomic mass of Oxygen (O)

3. Importance of Molar Mass

Details: Knowing the molar mass allows conversion between mass and moles, which is fundamental for chemical calculations including solution preparation, stoichiometry, and yield calculations.

4. Using the Calculator

Tips: Enter the mass of CuSO₄ in grams to calculate the number of moles. The calculator uses the standard molar mass of 159.609 g/mol for anhydrous CuSO₄.

5. Frequently Asked Questions (FAQ)

Q1: Does this include water of hydration?
A: No, this calculator uses the molar mass of anhydrous CuSO₄ (159.609 g/mol). For the pentahydrate (CuSO₄·5H₂O), the molar mass is 249.685 g/mol.

Q2: Why is molar mass important in chemistry?
A: Molar mass bridges the gap between the atomic/molecular scale and the macroscopic scale, allowing measurement of specific numbers of atoms or molecules by weighing.

Q3: How accurate is this value?
A: The value 159.609 g/mol uses IUPAC standard atomic weights. For extremely precise work, isotopic composition may need consideration.

Q4: Can I calculate moles for other compounds with this?
A: This calculator is specific for anhydrous CuSO₄. For other compounds, you would need their specific molar masses.

Q5: What's the difference between molecular weight and molar mass?
A: While often used interchangeably, molar mass is the mass of one mole of substance (g/mol), while molecular weight is dimensionless (relative to ¹²C).