Question

A chemist prepares a solution of copper(II) sulfate by measuring out of copper(II) sulfate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's copper(II) sulfate solution. Round your answer to significant digits.

Answer 1

The question is incomplete, here is the complete question:

A chemist prepares a solution of copper(II) sulfate $(CuSO_4)$ by measuring out 69.2 g of copper(II) sulfate into a 400. mL volumetric flask and filling the flask to the mark with water.

Calculate the concentration in mol/L of the chemist's copper(II) sulfate solution. Round your answer to 3 significant digits.

Answer: The molarity of copper (II) sulfate solution is 1.08 mol/L

Explanation:

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

We are given:

Given mass of copper (II) sulfate = 69.2 g

Molar mass of copper (II) sulfate = 159.6 g/mol

Volume of solution = 400. mL

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{69.2\times 1000}{159.6\times 400}\\\\\text{Molarity of solution}=1.08M$

Hence, the molarity of copper (II) sulfate solution is 1.08 mol/L