Question

Calculating molarity using solute moles Kirste A chemist prepares a solution of copper(II) fluoride (CuF) by measuring out 0.205 umol of copper(II) fluoride into a 300 ml volumetric flask and filling the ask to the mark with water. Calculate the concentration in mmol/L of the chemist's copper(11) fluoride solution. Be sure your answer has the correct number of significant digits. X 5 ?

Answer 1

Ans :

Amount of copper (II) fluoride = 0.205 umol = 0.000205 mmol

Volume of solution = 300 mL = 0.300 L

Concentration in mmol/L = mmol of solute / volume of solution in L

= 0.000205 mmol / 0.300 L

= 6.83 x 10^-4 mmol/L