Diluting a solution: How would you prepare 500.0 mL of 0.2500 M NaOH solution starting from a concentration of 1.00 M? Strategy: The problem gives initial and final concentration `(M_(i) and M_(f))` and final volume `(V_(f))` and asks for the initial volume `(V_(i))` that we need to dilute. Write the dilute formula (2.17) and rearrange it to give the initial volume.

Diluting a solution: How would you prepare 500.0 mL of 0.2500 M NaOH s

1.	Diluting a solution: How would you prepare 500.0 mL of 0.2500 M NaOH solution starting from a concentration of 1.00 M? Strategy: The problem gives initial and final concentration `(M_(i) and M_(f))` and final volume `(V_(f))` and asks for the initial volume `(V_(i))` that we need to dilute. Write the dilute formula (2.17) and rearrange it to give the initial volume.
Answer» According to Equation `(2.17)` `M_(i)V_(i)=M_(f)V_(f)` or `V_(i)=(M_(f)V_(f))/V_(i)` Substituting the known values into the right side of the equation: `V_(i)=((0.2500 M)(500.0 mL))/((1.000 M))` `=125.0 ML` In practice, bilution is carried out as follows: the valume to be diluted is withdrawn using a calibrated tube called a pipet, placed in an empty volumetric flask of the chosen volume, and diluted to the calibration mark on the flask. In this particle case, we need to place `125.0 mL` of `1.000 M NaOH` solution in a `500.0 mL` volumeritc flask and fill to the mark with water.

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