In the lab you need to make 1.00 L of a 0.300 M NaCl solution. You had previously made a 0.950 M NaCl solution that you can dilute to form your new solution. How many mL of the concentrated solution would you use to make the dilute solution?
To determine the volume of the concentrated solution needed to make the dilute solution, we can use the equation:
C1V1 = C2V2
Where:
C1 = Concentration of the concentrated solution (0.950 M)
V1 = Volume of the concentrated solution used (unknown)
C2 = Concentration of the dilute solution (0.300 M)
V2 = Volume of the dilute solution being prepared (1.00 L = 1000 mL)
Rearranging the equation to solve for V1, we have:
V1 = (C2V2) / C1
Substituting the given values:
V1 = (0.300 M * 1000 mL) / 0.950 M
Calculating this expression:
V1 = 315.79 mL
Therefore, you would need to use approximately 315.79 mL of the concentrated solution to make the dilute solution.