Question

How would you make 25.0 mL of a 0.750 Molar solution of copper sulfate pentahydrate?

A) moles=0.01875
B) moles=0.001875
C) moles=1.875
D) moles=18.75

Answer 1

To make a 25.0 mL of a 0.750 M solution of copper sulfate pentahydrate, you need 0.01875 moles of the solute, which corresponds to answer A.

Step-by-step explanation:

To make 25.0 mL of a 0.750 Molar solution of copper sulfate pentahydrate (CuSO4•5H2O), you first need to calculate the number of moles of solute needed using the formula:

Molarity (M) = Moles of solute (n) / Volume of solution (L)

For a 0.750 M solution in 0.025 L (since 25.0 mL = 0.025 L), the calculation is:

Moles of solute = Molarity × Volume of solution = 0.750 M × 0.025 L = 0.01875 moles

Therefore, the correct answer is A) moles=0.01875.