A chemist makes 360mL of calcium sulfate working solution by adding distilled water to 90.0mL of a 10.7mmol/L stock solution of calcium sulfate in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

The concentration of the chemist's working solution is 0.00268 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

According to the neutralization law,

where,

= molarity of stock solution = 10.7 mmol/L =  0.0107 mol/L  

 = volume of stock solution = 90.0 ml

= molarity of working  solution = ?

= volume of working solution = 360 ml

Thus the concentration of the chemist's working solution is 0.00268 M