Calculating the Molar Mass of Copper(II) Sulfate Pentahydrate

The periodic table provides us with a wealth of information about the elements that make up our universe. In chemistry, understanding the atomic weights of each element is crucial for calculating the molar mass of compounds. One such compound is Copper(II) Sulfate Pentahydrate, also known as Blue Vitriol. Its chemical formula is CuSO4·5H2O, and its molar mass is a critical value in many chemical reactions.

To calculate the molar mass of Copper(II) Sulfate Pentahydrate, we need to add up the total weight of all atoms that make up this compound. According to the periodic table, the atomic weights of each atom are as follows: Copper (Cu) is 63.546 g/mol, Sulfur (S) is 32.066 g/mol, and Oxygen (O) is 15.9994 g/mol.

From the chemical formula, we can see that one molecule of Copper(II) Sulfate Pentahydrate has one Copper atom, one Sulfur atom, four Oxygen atoms, and five water molecules. The total number of atoms in a single molecule is therefore seven (one Cu, one S, four O, and five H2O).

To calculate the molar mass, we need to multiply the atomic weight of each element by its corresponding number in the compound and then add up these values. For Copper(II) Sulfate Pentahydrate, this calculation yields a molar mass of 249.6866 g/mol.

This value is critical in many chemical reactions, including those involving the preparation of solutions with specific concentrations. In one such reaction, we need to prepare a solution of CuSO4 with a concentration of 0.20 M and a volume of 250 mL. To achieve this, we must first convert the given volume from milliliters to liters: 250 mL = 0.25 L.

Next, we set up the molarity equation using the given information:

Molarity (M) = number of moles of solute (n) / volume of solution in liters (L)

Rearranging this equation to solve for n, we obtain:

n = M × L

Substituting the values, we get:

n = 0.20 M × 0.25 L

= 0.05 mol CuSO4

Finally, we can use the molar mass of CuSO4 to convert the number of moles to grams:

0.05 mol CuSO4 × (159.609 g CuSO4 / 1 mol CuSO4) = 8.0 g CuSO4

In conclusion, the molar mass of Copper(II) Sulfate Pentahydrate is a critical value that plays a crucial role in many chemical reactions. By understanding how to calculate this value using the periodic table and chemical formula, we can better prepare solutions with specific concentrations and solve complex chemical problems.

Periodic table cuso4 molar mass