Question

25.2 g of CuSO4 6H20 (mm: 267.72 g/mol) is dissolved in 28.0 mL of water, calculate the molarity.

Answer 1

3.36 M

Step-by-step explanation:

Step 1: Given data

• Mass of CuSO₄.6H₂O (m): 25.2 g

• Molar mass of CuSO₄.6H₂O (M): 267.72 g/mol

• Volume of solution (V): 28.0 mL (we will assume it is equal to the volume of water)

Step 2: Calculate the moles (n) of CuSO₄.6H₂O (solute)

We will use the following expression.

n = m/M

n = 25.2 g / (267.72 g/mol) = 0.0941 mol

Step 3: Calculate the molarity

Molarity is equal to the moles of solute divided by the liters of solution.

M = 0.0941 mol/0.0280 L = 3.36 M