Calculating Volumes to Prepare Standard Solutions with KSCN

[brushman]

Calculate the volume of each reagent required to prepare 25.0 mL of each standard solution at the specified KSCN concentration. Fill in the rest of the table (attached).

My complete guess is that the solution II needs to be incremented by 2.5 ml each time.

 

[Borek]

Why do you guess instead of calculating? This is a simple dilution problem. Dilution is always based on mass conservation.

concentration, dilution and mixing

 

[brushman]

Thanks. For the first row I did (2 x 10^(-5))(25) = x (2 x 10^(-4)) and got x = 2.5 so it seems to be working.