A chemist prepares a solution of potassium iodide (KI) by measuring out 67.7. mu mol of potassium iodide into a 400. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmo1L of the chemist's potassium iodide solution. Round your answer to 3 significant digits.

Respuesta :

Answer: The concentration of potassium iodide in the solution is [tex]169.\mu M[/tex]

Explanation:

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

[tex]\text{Micro molarity of the solution}=\frac{\text{Micro moles of solute}\times 1000}{\text{Volume of solution (in mL)}}[/tex]

We are given:

Micro moles of potassium iodide = [tex]67.7\mu mol[/tex]

Volume of solution = 400 m

Putting values in above equation, we get:

[tex]\text{Micro molarity of KI}=\frac{67.7\mu mol\times 1000}{400}\\\\\text{Micro molarity of KI}=169.\mu M[/tex]

Hence, the concentration of potassium iodide in the solution is [tex]169.\mu M[/tex]